/**
 * BoxMind - Guarde um Pensamento
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ===========================
   CSS Custom Properties
   =========================== */
:root {
    /* Colors - Brand */
    --primary: #9146FF;
    --primary-dark: #6441A5;
    --primary-light: #b57bff;
    --black: #000000;
    --white: #FFFFFF;
    --dark-bg: #18181B;
    
    /* Colors - UI */
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Glow effects */
    --glow-primary: 0 0 20px rgba(145, 70, 255, 0.3);
    --glow-primary-strong: 0 0 30px rgba(145, 70, 255, 0.5);
    
    /* Z-Index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-toast: 500;
}

/* Dark Mode */
[data-theme="dark"] {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;
    --bg-primary: #18181B;
    --bg-secondary: #27272a;
    --bg-tertiary: #3f3f46;
    --border-color: #3f3f46;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* ===========================
   Reset & Base Styles
   =========================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(145, 70, 255, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(145, 70, 255, 0.03) 0px, transparent 50%);
    background-attachment: fixed;
}

html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

[data-theme="dark"] body {
    background-image: 
        radial-gradient(at 0% 0%, rgba(145, 70, 255, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(145, 70, 255, 0.05) 0px, transparent 50%);
}

/* ===========================
   Loading Screen
   =========================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    z-index: 9999;
    animation: fadeOut 0.5s ease 2s forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--white);
    border-right-color: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
    box-shadow: var(--glow-primary);
    position: relative;
}

.loading-spinner::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: var(--radius-full);
    border: 2px solid rgba(255, 255, 255, 0.1);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.1);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: var(--spacing-lg);
    animation: logoPulse 2s ease-in-out infinite;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

@keyframes logoPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.loading-text {
    margin-top: var(--spacing-lg);
    color: var(--white);
    font-size: var(--font-size-lg);
    font-weight: 500;
    animation: fadeInOut 2s ease-in-out infinite;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
}

/* ===========================
   App Container
   =========================== */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-bottom: 80px; /* Space for bottom nav */
}

/* ===========================
   Header
   =========================== */
.app-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideDownHeader 0.5s ease-out;
}

@keyframes slideDownHeader {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    display: block;
    transition: transform var(--transition-base);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.app-icon:hover {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.icon-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--font-size-lg);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.icon-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.icon-btn:hover::before {
    width: 100%;
    height: 100%;
}

.icon-btn:active {
    transform: scale(1.05) rotate(0deg);
}

/* ===========================
   Main Content
   =========================== */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    position: relative;
    z-index: 1;
}

.main-content::before,
.main-content::after {
    content: '';
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    pointer-events: none;
    transition: transform 1.5s ease, opacity 1.5s ease;
}

.main-content::before {
    top: 5%;
    left: -80px;
    background: radial-gradient(circle at center, rgba(145, 70, 255, 0.45), transparent 65%);
}

.main-content::after {
    bottom: 10%;
    right: -60px;
    background: radial-gradient(circle at center, rgba(45, 212, 191, 0.25), transparent 70%);
}

[data-theme="dark"] .main-content::before {
    background: radial-gradient(circle at center, rgba(145, 70, 255, 0.25), transparent 65%);
    opacity: 0.5;
}

[data-theme="dark"] .main-content::after {
    background: radial-gradient(circle at center, rgba(45, 212, 191, 0.2), transparent 70%);
    opacity: 0.45;
}

.main-content:hover::before,
.main-content:hover::after {
    opacity: 0.45;
    transform: translateY(-10px) scale(1.05);
}

.section {
    display: none;
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.section.active {
    display: block;
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===========================
   Hero Section
   =========================== */
.hero-section {
    position: relative;
    text-align: center;
    padding: calc(var(--spacing-xl) * 1.2) var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    background: linear-gradient(135deg, rgba(145, 70, 255, 0.18) 0%, rgba(45, 212, 191, 0.12) 100%);
    overflow: hidden;
    box-shadow: 0 30px 120px rgba(17, 24, 39, 0.12);
}

.hero-section::before,
.hero-section::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    pointer-events: none;
}

.hero-section::before {
    width: 240px;
    height: 240px;
    top: -80px;
    left: -60px;
    background: radial-gradient(circle, rgba(145, 70, 255, 0.55) 0%, transparent 65%);
}

.hero-section::after {
    width: 260px;
    height: 260px;
    bottom: -90px;
    right: -70px;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.45) 0%, transparent 70%);
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, rgba(45, 51, 73, 0.75) 0%, rgba(56, 34, 92, 0.75) 100%);
    box-shadow: 0 30px 120px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .hero-section::before {
    background: radial-gradient(circle, rgba(145, 70, 255, 0.35) 0%, transparent 65%);
}

[data-theme="dark"] .hero-section::after {
    background: radial-gradient(circle, rgba(45, 212, 191, 0.28) 0%, transparent 70%);
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease-out;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    animation: fadeInUp 0.8s ease-out;
    font-weight: 500;
    max-width: 560px;
    margin: 0 auto;
}

/* ===========================
   Form Styles
   =========================== */
.thought-form {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.thought-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(145, 70, 255, 0.05), transparent);
    transition: left 0.5s ease;
}

.thought-form:hover::before {
    left: 100%;
}

.thought-form:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary-light);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
}

.thought-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    resize: vertical;
    transition: all var(--transition-base);
    position: relative;
}

.thought-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(145, 70, 255, 0.15), var(--glow-primary);
    transform: translateY(-1px);
    background: var(--bg-primary);
}

.thought-input::placeholder {
    color: var(--text-light);
    transition: color var(--transition-base);
}

.thought-input:focus::placeholder {
    color: var(--text-secondary);
}

.char-counter {
    text-align: right;
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-top: var(--spacing-xs);
}

/* ===========================
   Duration Options
   =========================== */
.duration-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    gap: var(--spacing-md);
}

.duration-option {
    cursor: pointer;
}

.duration-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.duration-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    min-height: 90px;
    position: relative;
    overflow: hidden;
}

.duration-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.duration-card > * {
    position: relative;
    z-index: 1;
}

.duration-option input[type="radio"]:checked + .duration-card {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    transform: scale(1.08);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.duration-option input[type="radio"]:checked + .duration-card::before {
    opacity: 1;
}

.duration-option:hover .duration-card {
    border-color: var(--primary-light);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-md);
}

.duration-option:active .duration-card {
    transform: translateY(-2px) scale(1.05);
}

.duration-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: var(--line-height-tight);
}

.duration-unit {
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 48px;
    font-family: var(--font-sans);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus-visible {
    outline: 3px solid rgba(145, 70, 255, 0.5);
    outline-offset: 2px;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-secondary:focus-visible {
    outline: 3px solid rgba(145, 70, 255, 0.5);
    outline-offset: 2px;
}

.btn-lock {
    width: 100%;
}

/* ===========================
   Thoughts List
   =========================== */
.section-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-title::after {
    content: '';
    display: inline-block;
    width: 48px;
    height: 4px;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--primary) 0%, rgba(45, 212, 191, 0.8) 100%);
    box-shadow: 0 4px 16px rgba(145, 70, 255, 0.25);
}

.section-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.thoughts-list {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.thought-card {
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.92) 0%, rgba(249, 250, 251, 0.95) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    animation: cardFadeIn 0.4s ease-out;
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .thought-card {
    background: linear-gradient(160deg, rgba(39, 39, 42, 0.92) 0%, rgba(24, 24, 27, 0.9) 100%);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
    border-color: rgba(145, 70, 255, 0.15);
}

[data-theme="dark"] .thought-card:hover {
    background: linear-gradient(160deg, rgba(45, 45, 53, 0.94) 0%, rgba(24, 24, 27, 0.94) 100%);
    box-shadow: 0 32px 70px rgba(0, 0, 0, 0.6);
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.thought-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    transform: scaleY(0);
    transition: transform var(--transition-base);
    transform-origin: top;
}

.thought-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(145, 70, 255, 0.18), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

[data-theme="dark"] .thought-card::after {
    background: radial-gradient(circle at top right, rgba(145, 70, 255, 0.22), transparent 65%);
}

.thought-card:hover::before {
    transform: scaleY(1);
}

.thought-card:hover::after {
    opacity: 1;
}

.thought-card:hover {
    box-shadow: 0 32px 70px rgba(15, 23, 42, 0.14);
    transform: translateY(-4px) scale(1.02);
    border-color: var(--primary-light);
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.98) 0%, rgba(245, 247, 255, 0.98) 100%);
}

.thought-card:active {
    transform: translateY(-2px) scale(1.01);
}

.thought-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.thought-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary);
}

.thought-status i {
    font-size: var(--font-size-base);
}

.thought-date {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

.thought-preview {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
    font-style: italic;
}

.thought-preview i {
    color: var(--primary);
    font-size: var(--font-size-lg);
}

.thought-countdown {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
}

.countdown-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.countdown-time {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary);
    animation: pulseCountdown 2s ease-in-out infinite;
    text-shadow: 0 0 10px rgba(145, 70, 255, 0.3);
}

@keyframes pulseCountdown {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.thought-text {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    line-height: var(--line-height-relaxed);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.thought-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

/* ===========================
   Empty State
   =========================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease-out;
}

.empty-icon {
    font-size: 5rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
    filter: grayscale(0.3);
    transition: filter var(--transition-base);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.empty-state:hover .empty-icon {
    filter: grayscale(0);
    transform: scale(1.1);
}

.empty-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===========================
   FAQ Section
   =========================== */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    border-color: var(--primary-light);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-base);
}

.faq-question:hover {
    background: var(--bg-tertiary);
}

.faq-icon {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--primary);
    transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================
   Bottom Navigation
   =========================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    border-top: 1px solid rgba(145, 70, 255, 0.1);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -10px 45px rgba(15, 23, 42, 0.08);
    z-index: var(--z-fixed);
    backdrop-filter: blur(16px);
}

[data-theme="dark"] .bottom-nav {
    background: rgba(24, 24, 27, 0.85);
    border-top: 1px solid rgba(145, 70, 255, 0.2);
    box-shadow: 0 -10px 45px rgba(0, 0, 0, 0.6);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-xs);
    font-weight: 500;
    transition: all var(--transition-base);
    border-radius: var(--radius-md);
    min-width: 70px;
    position: relative;
}

.nav-item i {
    font-size: var(--font-size-xl);
    transition: transform var(--transition-base);
}

.nav-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base);
}

.nav-item.active {
    color: var(--primary);
}

.nav-item.active::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-item.active i {
    transform: scale(1.15);
}

.nav-item:hover {
    background: var(--bg-secondary);
    color: var(--primary);
    transform: translateY(-2px);
}

.nav-item:hover i {
    transform: scale(1.1);
}

/* ===========================
   Modal
   =========================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: var(--spacing-md);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl), var(--glow-primary-strong);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-sm);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.unlock-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border-bottom: none;
}

.unlock-date {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.unlock-text {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    line-height: var(--line-height-relaxed);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.unlock-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ===========================
   Settings
   =========================== */
.setting-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-group:last-child {
    border-bottom: none;
}

.setting-label {
    font-weight: 600;
    color: var(--text-primary);
}

.setting-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    cursor: pointer;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-base);
    border-radius: var(--radius-full);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: var(--white);
    transition: var(--transition-base);
    border-radius: var(--radius-full);
}

input:checked + .toggle-slider {
    background-color: var(--primary);
}

input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* ===========================
   Toast Notification
   =========================== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl), var(--glow-primary);
    z-index: var(--z-toast);
    transition: transform var(--transition-bounce), opacity var(--transition-base);
    max-width: 90%;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: toastSlideIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(100px) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    animation: toastSlideIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toast-icon {
    font-size: var(--font-size-lg);
}

.toast-message {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===========================
   Share Section
   =========================== */
#share-section {
    position: relative;
    padding: var(--spacing-xl) 0;
}

#share-section::before {
    content: '';
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-2xl);
    background: linear-gradient(135deg, rgba(145, 70, 255, 0.08) 0%, rgba(59, 130, 246, 0.08) 50%, rgba(45, 212, 191, 0.08) 100%);
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] #share-section::before {
    background: linear-gradient(135deg, rgba(88, 28, 135, 0.2) 0%, rgba(30, 64, 175, 0.16) 50%, rgba(13, 148, 136, 0.14) 100%);
}

#share-section .section-header {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: flex-start;
    margin: 0 auto var(--spacing-xl);
    max-width: 760px;
    text-align: left;
}

#share-section .section-title,
#share-section .section-subtitle {
    width: 100%;
}

#share-section .section-subtitle {
    max-width: 640px;
    color: var(--text-secondary);
}

.share-grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: var(--spacing-2xl);
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    align-items: stretch;
    width: 100%;
}

.share-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.95) 0%, rgba(243, 244, 246, 0.9) 100%);
    box-shadow: 0 28px 60px rgba(15, 23, 42, 0.12);
    border: 1px solid rgba(145, 70, 255, 0.12);
    backdrop-filter: blur(12px);
    min-width: 0;
}

[data-theme="dark"] .share-card {
    background: linear-gradient(160deg, rgba(39, 39, 42, 0.92) 0%, rgba(24, 24, 27, 0.9) 100%);
    box-shadow: 0 28px 60px rgba(0, 0, 0, 0.55);
    border: 1px solid rgba(145, 70, 255, 0.24);
}

.share-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.share-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--glow-primary);
    flex-shrink: 0;
    font-size: var(--font-size-xl);
}

.share-card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs);
}

.share-card-subtitle {
    color: var(--text-secondary);
    margin: 0;
    line-height: var(--line-height-relaxed);
}

.share-card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.share-card-body > * {
    min-width: 0;
}

.share-grid .form-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.url-copy-container {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.share-url-section,
.social-share-section {
    width: 100%;
    min-height: 100%;
}

.share-url-section > *,
.social-share-section > * {
    min-width: 0;
}

.url-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: all var(--transition-base);
    font-weight: 500;
    min-width: 0;
}

.url-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(145, 70, 255, 0.15), var(--glow-primary);
    transform: translateY(-1px);
}

.url-input:hover {
    border-color: var(--primary-light);
}

.btn-copy {
    min-width: 120px;
    white-space: nowrap;
}

.url-copy-feedback {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--primary);
    font-weight: 600;
    text-align: center;
    animation: feedbackSlideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.url-copy-feedback::before {
    content: '✓';
    display: inline-block;
    width: 20px;
    height: 20px;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    animation: checkmarkPop 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes feedbackSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes checkmarkPop {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

.social-share-section {
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.9) 0%, rgba(243, 244, 246, 0.9) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.1);
    border: 1px solid rgba(145, 70, 255, 0.12);
    backdrop-filter: blur(12px);
}

[data-theme="dark"] .social-share-section {
    background: linear-gradient(160deg, rgba(39, 39, 42, 0.92) 0%, rgba(24, 24, 27, 0.9) 100%);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
    border: 1px solid rgba(145, 70, 255, 0.2);
}

.social-share-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    word-break: break-word;
}

.social-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.social-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--white);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    min-height: 100px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.social-btn span {
    position: relative;
    z-index: 1;
    display: block;
    word-break: break-word;
}

.social-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.social-btn:hover::before {
    width: 200%;
    height: 200%;
}

.social-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.3);
}

.social-btn:active {
    transform: translateY(-2px) scale(1.02);
}

.social-btn i {
    position: relative;
    z-index: 1;
    transition: transform var(--transition-base);
}

.social-btn:hover i {
    transform: scale(1.2) rotate(5deg);
}

.social-btn i {
    font-size: var(--font-size-2xl);
}

.social-facebook {
    background: linear-gradient(135deg, #1877F2 0%, #0d5fcc 100%);
}

.social-facebook:hover {
    background: linear-gradient(135deg, #1a7ff5 0%, #0e66d4 100%);
}

.social-twitter {
    background: linear-gradient(135deg, #1DA1F2 0%, #0d8bd9 100%);
}

.social-twitter:hover {
    background: linear-gradient(135deg, #1fa8f5 0%, #0e92e1 100%);
}

.social-linkedin {
    background: linear-gradient(135deg, #0077B5 0%, #005885 100%);
}

.social-linkedin:hover {
    background: linear-gradient(135deg, #0080c0 0%, #00608f 100%);
}

.social-whatsapp {
    background: linear-gradient(135deg, #25D366 0%, #1da851 100%);
}

.social-whatsapp:hover {
    background: linear-gradient(135deg, #28e06d 0%, #20b85a 100%);
}

.social-telegram {
    background: linear-gradient(135deg, #0088cc 0%, #006699 100%);
}

.social-telegram:hover {
    background: linear-gradient(135deg, #0099dd 0%, #0077aa 100%);
}

.social-email {
    background: linear-gradient(135deg, #6B7280 0%, #4B5563 100%);
}

.social-email:hover {
    background: linear-gradient(135deg, #757a87 0%, #525c6d 100%);
}

/* ===========================
   Footer
   =========================== */
.app-footer {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    margin-bottom: 75px;
}

.app-footer p {
    margin: var(--spacing-xs) 0;
}

.b20-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
}

.b20-link:hover {
    text-decoration: underline;
    transform: scale(1.05);
    display: inline-block;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .thought-form {
        padding: var(--spacing-lg);
    }
    
    .duration-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .social-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .url-copy-container {
        flex-direction: column;
    }
    
    .btn-copy {
        width: 100%;
    }

    .share-grid {
        grid-template-columns: 1fr;
    }

    .social-buttons {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 768px) {
    .thoughts-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .main-content {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    .thoughts-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===========================
   Accessibility
   =========================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

*:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 5px rgba(145, 70, 255, 0.3);
}

/* Skip to main content for accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary);
    color: var(--white);
    padding: var(--spacing-md);
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
    top: 0;
}

/* ===========================
   Animations
   =========================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .empty-icon {
        animation: none !important;
    }
    
    .countdown-time {
        animation: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }
    
    .btn-primary,
    .social-btn {
        border: 2px solid currentColor;
    }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    .bottom-nav,
    .app-header,
    .app-footer,
    .btn,
    .modal {
        display: none !important;
    }
}