/**
 * Gerador de Estudo Bíblico - Styles
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* CSS Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties */
:root {
    /* Color Palette - Premium Emerald SaaS (Light Mode) */
    --primary-color: #059669; /* Emerald 600 - Great contrast with white */
    --primary-hover: #047857; /* Emerald 700 */
    --accent-color: #10B981; /* Emerald 500 */
    --primary-light: rgba(16, 185, 129, 0.1);
    
    --bg-color: #F8FAFC; /* Slate 50 - Premium cool off-white background */
    --surface-color: #FFFFFF; /* Pure white for cards */
    
    --text-primary: #0F172A; /* Slate 900 */
    --text-secondary: #475569; /* Slate 600 */
    --text-muted: #94A3B8; /* Slate 400 */
    
    --border-subtle: #E2E8F0; /* Slate 200 */
    
    /* Layout */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 20px;
    --spacing-unit: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Elegant SaaS Soft Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 10px 20px rgba(5, 150, 105, 0.15);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 2000;
}

/* Dark Mode - GoAdopt Neon Aesthetic */
body.dark-theme {
    --bg-color: #0B0E11;
    --surface-color: #1A1F25;
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    /* Neon Green overrides for dark mode */
    --primary-color: #00DD80;
    --primary-hover: #00C270;
    --accent-color: #00DD80;
    --primary-light: rgba(0, 221, 128, 0.1);
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    
    /* Deep glowing shadows */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 8px 24px rgba(0, 221, 128, 0.25);
}

/* Base Styles */
html {
    font-size: clamp(14px, 2.5vw, 18px);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    padding-top: 60px; /* Header height */
    padding-bottom: env(safe-area-inset-bottom, 0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@media (max-width: 767px) {
    body {
        padding-bottom: calc(70px + env(safe-area-inset-bottom, 0));
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Layout Components */
.container {
    width: 100%;
    max-width: 100%;
    padding: 0 16px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding: 0 24px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: 1200px;
    }
}

/* Header Styles */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    box-shadow: var(--shadow-sm);
    z-index: var(--z-fixed);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-subtle, color-mix(in srgb, var(--primary-color) 10%, transparent));
}

body.dark-theme .app-header {
    background-color: rgba(11, 14, 17, 0.8);
    border-bottom: 1px solid var(--border-subtle);
}

.header-logo h1 {
    font-size: var(--font-size-lg);
    margin: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.header-logo a {
    text-decoration: none;
}

.header-logo i {
    margin-right: calc(var(--spacing-unit) * 1);
    color: var(--accent-color);
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
    gap: calc(var(--spacing-unit) * 1);
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
    }
    
    .bottom-nav {
        display: none !important;
    }
}

.desktop-nav .nav-link {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: var(--font-size-sm);
}

.desktop-nav .nav-link:hover,
.desktop-nav .nav-link.active {
    background: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

.header-logo {
    display: flex;
    align-items: center;
}

.header-logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.header-logo i {
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.btn-icon {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--surface-color);
    color: var(--primary-color);
}

/* Bottom Navigation (Mobile) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 65px;
    background: var(--bg-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: var(--z-fixed);
    padding-bottom: env(safe-area-inset-bottom, 0);
    border-top: 1px solid var(--border-subtle, color-mix(in srgb, var(--primary-color) 10%, transparent));
}

body.dark-theme .bottom-nav {
    background-color: rgba(11, 14, 17, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-subtle);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-size-xs);
    font-weight: 500;
    transition: var(--transition);
    min-width: 64px;
    min-height: 48px;
}

.nav-item i {
    font-size: 20px;
    transition: transform 0.2s ease;
}

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

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

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

/* Main Content */
.main-content {
    min-height: calc(100vh - 60px);
    padding: calc(var(--spacing-unit) * 3) 0;
}

@media (max-width: 767px) {
    .main-content {
        min-height: calc(100vh - 135px);
    }
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.page-header h2 {
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.page-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section Redesign */
.hero-section {
    position: relative;
    padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 10);
    overflow: hidden;
    margin-bottom: calc(var(--spacing-unit) * 6);
    border-bottom: 1px solid var(--border-subtle);
}

.hero-bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    opacity: 0.5;
}

.glow-1 {
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: var(--primary-light);
}

.glow-2 {
    bottom: -150px;
    left: -150px;
    width: 300px;
    height: 300px;
    background: rgba(16, 185, 129, 0.08);
}

.hero-container {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 6);
    align-items: center;
    position: relative;
    z-index: 2;
}

@media (min-width: 1024px) {
    .hero-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .hero-text-side {
        flex: 1;
        text-align: left;
        max-width: 600px;
    }
    
    .hero-visual-side {
        flex: 1;
        display: flex;
        justify-content: center;
        align-items: center;
        position: relative;
    }
    .hero-actions {
        justify-content: flex-start;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 3);
    border: 1px solid color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: calc(var(--spacing-unit) * 3);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.hero-title span {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    margin-bottom: calc(var(--spacing-unit) * 4);
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.hero-social-proof {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: calc(var(--spacing-unit) * 4);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.users-avatars i {
    font-size: 24px;
    color: var(--border-subtle);
    margin-left: -8px;
}
.users-avatars i:first-child { margin-left: 0; }

.hero-visual-side {
    position: relative;
    width: 100%;
}

.feature-preview {
    background: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 2);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
}

.preview-card {
    border: none;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.preview-header {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.preview-content {
    background: var(--surface-color);
    padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 3);
}

.mock-line {
    background: var(--border-subtle);
    height: 12px;
    border-radius: 6px;
    margin-bottom: 12px;
}
.skeleton-title { width: 60%; height: 16px; margin-bottom: 20px;}
.skeleton-body { width: 100%; }
.short { width: 80%; }

.mock-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--surface-color);
    border: 1px solid var(--primary-light);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-top: 16px;
}

/* Floating elements */
.floating-card {
    position: absolute;
    background: var(--bg-color);
    border: 1px solid var(--border-subtle);
    padding: 12px 20px;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-md);
    z-index: 3;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    animation: float 6s ease-in-out infinite;
}

.card-top {
    top: -20px;
    right: 5%;
    animation-delay: 0s;
}

.card-bottom {
    bottom: -20px;
    left: 5%;
    animation-delay: 2s;
}

.fc-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn-large {
    padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 4);
    font-size: var(--font-size-lg);
    min-height: 52px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

body.dark-theme .btn-primary {
    color: #000000;
    font-weight: 700;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover, var(--shadow-md));
    color: white;
    text-decoration: none;
}

body.dark-theme .btn-primary:hover {
    color: #000000;
}

/* Primary Button Glow Effect */
.btn.has-glow {
    animation: pulsingGlow 2.5s infinite alternate;
}

@keyframes pulsingGlow {
    0% { box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1), 0 0 0px transparent; }
    100% { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15), 0 0 20px rgba(5, 150, 105, 0.4); }
}

body.dark-theme .btn.has-glow {
    animation: pulsingGlowDark 2.5s infinite alternate;
}

@keyframes pulsingGlowDark {
    0% { box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3), 0 0 10px rgba(0, 221, 128, 0.2); }
    100% { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 221, 128, 0.5); }
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    text-decoration: none;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Form Styles */
.form-group {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.form-label {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 1);
    font-size: var(--font-size-sm);
}

.form-input,
.form-select,
.search-input {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    border: 2px solid color-mix(in srgb, var(--primary-color) 20%, transparent);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    background: var(--bg-color);
    color: var(--text-primary);
    transition: var(--transition);
    min-height: 48px;
}

/* Custom Select Appearance for pristine SaaS look */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25em;
    padding-right: calc(var(--spacing-unit) * 6);
}

body.dark-theme .form-select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}

.form-input:focus,
.form-select:focus,
.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-error {
    color: #e53e3e;
    font-size: var(--font-size-sm);
    margin-top: calc(var(--spacing-unit) * 1);
    display: none;
}

.form-error.show {
    display: block;
}

.form-actions {
    margin-top: calc(var(--spacing-unit) * 4);
    text-align: center;
}

/* Generator Form */
.generator-section {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 5) calc(var(--spacing-unit) * 4);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-subtle);
    border-top: 4px solid var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 8);
    position: relative;
    z-index: 2;
    backdrop-filter: blur(12px);
}

@media (min-width: 768px) {
    .generator-section {
        padding: calc(var(--spacing-unit) * 6) calc(var(--spacing-unit) * 8);
    }
}

/* Quick Themes */
.quick-themes-section {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.section-title {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 3);
    font-size: var(--font-size-xl);
}

.quick-themes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.theme-card {
    background: var(--surface-color);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 3);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 1);
    box-shadow: var(--shadow-sm);
}

.theme-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    background: var(--primary-light);
}

.theme-card i {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.theme-card h4 {
    font-size: var(--font-size-base);
    margin: 0;
    color: var(--text-primary);
}

.theme-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
    margin-top: calc(var(--spacing-unit) * 4);
}

.feature-card {
    background: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 4);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid color-mix(in srgb, var(--primary-color) 10%, transparent);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto calc(var(--spacing-unit) * 2);
}

.feature-icon i {
    font-size: 24px;
    color: var(--primary-color);
}

.feature-card h4 {
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

/* Categories */
.category-group {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.category-title {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    color: var(--primary-color);
    font-size: var(--font-size-xl);
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding-bottom: calc(var(--spacing-unit) * 2);
    border-bottom: 2px solid var(--surface-color);
}

.themes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

/* Search */
.search-section {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: calc(var(--spacing-unit) * 2);
    color: var(--text-muted);
    z-index: 1;
}

.search-input {
    padding-left: calc(var(--spacing-unit) * 5) !important;
    padding-right: calc(var(--spacing-unit) * 5) !important;
}

.search-clear {
    position: absolute;
    right: calc(var(--spacing-unit) * 2);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: calc(var(--spacing-unit) * 1);
    border-radius: 50%;
    transition: var(--transition);
}

.search-clear:hover {
    background: var(--surface-color);
    color: var(--text-primary);
}

/* Study Content */
.study-content {
    max-width: 800px;
    margin: 0 auto;
}

.study-header {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
    padding-bottom: calc(var(--spacing-unit) * 4);
    border-bottom: 2px solid var(--surface-color);
}

.study-meta {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.study-title {
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.study-actions {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    justify-content: center;
    flex-wrap: wrap;
}

.study-section {
    margin-bottom: calc(var(--spacing-unit) * 6);
    background: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 4);
    box-shadow: var(--shadow-sm);
    border: 1px solid color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.study-section h2 {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding-bottom: calc(var(--spacing-unit) * 2);
    border-bottom: 1px solid var(--surface-color);
}

.base-verse {
    background: var(--surface-color);
    border-left: 4px solid var(--primary-color);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    font-style: italic;
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--text-primary);
    margin: 0;
}

.topics-content .topic {
    margin-bottom: calc(var(--spacing-unit) * 4);
    padding-bottom: calc(var(--spacing-unit) * 3);
    border-bottom: 1px solid var(--surface-color);
}

.topics-content .topic:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.topic h3 {
    color: var(--accent-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.questions-content .question {
    background: var(--surface-color);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 2);
    border-left: 4px solid var(--secondary-color);
}

.questions-content .question:last-child {
    margin-bottom: 0;
}

/* Loading States */
.loading-skeleton {
    animation: pulse 1.5s ease-in-out infinite;
}

.skeleton-line {
    height: 20px;
    background: var(--surface-color);
    border-radius: var(--border-radius-sm);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.skeleton-title {
    height: 32px;
    width: 60%;
}

.skeleton-subtitle {
    height: 24px;
    width: 80%;
}

.skeleton-block {
    height: 100px;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
}

.loading-content {
    background: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 6);
    text-align: center;
    max-width: 300px;
    width: 90%;
}

.loading-spinner {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.loading-spinner i {
    animation: float-pulse 2s ease-in-out infinite;
    display: inline-block;
}

@keyframes float-pulse {
    0% { transform: translateY(0) scale(1); filter: drop-shadow(0 0 5px var(--primary-light)); }
    50% { transform: translateY(-10px) scale(1.05); filter: drop-shadow(0 15px 15px var(--primary-color)); }
    100% { transform: translateY(0) scale(1); filter: drop-shadow(0 0 5px var(--primary-light)); }
}

/* FAQ Styles */
.faq-section {
    margin-top: calc(var(--spacing-unit) * 8);
    margin-bottom: calc(var(--spacing-unit) * 6);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid color-mix(in srgb, var(--primary-color) 20%, transparent);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 2);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    background: var(--surface-color);
    border: none;
    padding: calc(var(--spacing-unit) * 3);
    text-align: left;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--primary-light);
}

.faq-question[aria-expanded="true"] {
    background: var(--primary-color);
    color: white;
}

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

.faq-icon {
    font-size: var(--font-size-lg);
    font-weight: 300;
    transition: transform 0.3s ease;
}

.faq-answer {
    background: var(--bg-color);
    padding: 0 calc(var(--spacing-unit) * 3);
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-answer.show {
    padding: calc(var(--spacing-unit) * 3);
    max-height: 200px;
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: calc(80px + env(safe-area-inset-bottom, 0));
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-color);
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: var(--z-toast);
    max-width: 90%;
    text-align: center;
    font-weight: 500;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (min-width: 768px) {
    .toast {
        bottom: calc(20px + env(safe-area-inset-bottom, 0));
    }
}

/* Helper Content - Legal Pages */
.legal-content h3 {
    margin-top: calc(var(--spacing-unit) * 4);
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--primary-color);
    font-size: var(--font-size-xl);
}

.legal-content p {
    margin-bottom: calc(var(--spacing-unit) * 2);
    line-height: 1.7;
    color: var(--text-primary);
}

/* Premium Footer */
.app-footer {
    background: var(--surface-color);
    padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 4);
    border-top: 1px solid var(--border-subtle);
    margin-top: calc(var(--spacing-unit) * 8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 4);
    margin-bottom: calc(var(--spacing-unit) * 6);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.footer-brand .logo i {
    color: var(--primary-color);
}

.app-logo {
    height: 48px;
    width: auto;
    display: block;
    object-fit: contain;
}

.app-logo-footer {
    height: 60px;
    width: auto;
    display: block;
    object-fit: contain;
}

@media (max-width: 480px) {
    .app-logo { height: 38px; }
    .app-logo-footer { height: 50px; }
}

.footer-brand .brand-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    max-width: 300px;
}

.footer-links-group h4 {
    color: var(--text-primary);
    font-size: var(--font-size-base);
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-weight: 600;
}

.footer-links-group a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.footer-links-group a:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid var(--border-subtle);
    padding-top: calc(var(--spacing-unit) * 3);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    gap: calc(var(--spacing-unit) * 2);
}

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

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

/* Error States */
.study-error,
.no-results {
    text-align: center;
    padding: calc(var(--spacing-unit) * 6);
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    margin: calc(var(--spacing-unit) * 4) 0;
}

.study-error i,
.no-results i {
    font-size: 48px;
    color: var(--text-muted);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.error-actions,
.section-actions {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: calc(var(--spacing-unit) * 3);
}

/* Action Cards */
.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    margin-top: calc(var(--spacing-unit) * 3);
}

.action-card {
    background: var(--surface-color);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 3);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.action-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
    text-decoration: none;
}

.action-card i {
    font-size: 32px;
    color: var(--primary-color);
}

.action-card h4 {
    margin: 0;
    font-size: var(--font-size-base);
}

.action-card p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* About Page Specific Styles */
.about-section,
.features-detail-section,
.technology-section,
.team-section,
.values-section,
.contact-section,
.cta-section {
    margin-bottom: calc(var(--spacing-unit) * 6);
    background: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 4);
    box-shadow: var(--shadow-sm);
    border: 1px solid color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.features-detail-grid,
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    margin-top: calc(var(--spacing-unit) * 3);
}

.feature-detail-card,
.value-card {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 3);
    text-align: center;
    transition: var(--transition);
}

.feature-detail-card:hover,
.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.feature-detail-icon,
.value-card i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
    justify-content: center;
    margin: calc(var(--spacing-unit) * 4) 0;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    padding: calc(var(--spacing-unit) * 2);
    background: var(--surface-color);
    border-radius: var(--border-radius);
    min-width: 120px;
}

.tech-item i {
    font-size: 32px;
    color: var(--primary-color);
}

.company-info {
    display: flex;
    gap: calc(var(--spacing-unit) * 3);
    align-items: flex-start;
}

.company-logo {
    background: var(--primary-color);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.company-links {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 1);
    margin-top: calc(var(--spacing-unit) * 2);
}

.company-link {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    color: var(--primary-color);
    text-decoration: none;
    font-size: var(--font-size-sm);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    margin-top: calc(var(--spacing-unit) * 3);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 3);
    background: var(--surface-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.contact-method:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
    text-decoration: none;
}

.contact-method i {
    font-size: 24px;
    color: var(--primary-color);
}

.contact-method h4 {
    margin: 0;
    font-size: var(--font-size-base);
}

.contact-method p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.cta-content {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--surface-color) 100%);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 4);
}

/* Dynamically Generated Components (JS) */
.studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.study-card {
    background: var(--surface-color);
    border: 1px solid var(--border-subtle, transparent);
    border-radius: var(--border-radius-lg);
    padding: calc(var(--spacing-unit) * 3);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.study-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.study-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid color-mix(in srgb, var(--text-muted) 20%, transparent);
    padding-bottom: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.study-card-header h4 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    flex: 1;
}

.study-date {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 500;
}

.study-preview {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: calc(var(--spacing-unit) * 3);
    flex-grow: 1;
}

.study-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid color-mix(in srgb, var(--text-muted) 20%, transparent);
}

.study-duration {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    background: var(--primary-light);
    padding: 2px 8px;
    border-radius: 12px;
}

.empty-state {
    text-align: center;
    padding: calc(var(--spacing-unit) * 6);
    background: var(--surface-color);
    border: 1px dashed var(--primary-color);
    border-radius: var(--border-radius-lg);
    grid-column: 1 / -1;
}

.empty-state i {
    font-size: 48px;
    color: var(--primary-light);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.empty-state h3 {
    margin-bottom: calc(var(--spacing-unit) * 1);
    color: var(--text-primary);
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.study-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface-color);
    padding: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 1);
    border: 1px solid var(--border-subtle, transparent);
    transition: var(--transition);
}

.study-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.study-info h4 {
    margin: 0 0 4px 0;
    font-size: var(--font-size-base);
    color: var(--text-primary);
}

.study-meta {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}


/* Responsive Adjustments */
@media (max-width: 767px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 300px;
    }
    
    .study-actions {
        flex-direction: column;
    }
    
    .study-actions .btn {
        width: 100%;
    }
    
    .company-info {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .themes-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
    
    .quick-themes-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .hero-section {
        padding: calc(var(--spacing-unit) * 4) 0;
    }
    
    .generator-section,
    .study-section,
    .about-section {
        padding: calc(var(--spacing-unit) * 3);
    }
    
    .themes-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .app-header,
    .bottom-nav,
    .app-footer,
    .study-actions,
    .related-actions {
        display: none !important;
    }
    
    body {
        padding-top: 0;
        padding-bottom: 0;
    }
    
    .main-content {
        padding: 0;
    }
    
    .study-section {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
        margin-bottom: calc(var(--spacing-unit) * 3);
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn:focus,
.form-input:focus,
.form-select:focus {
    outline: none;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 30%, transparent);
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000;
        --text-primary: #000;
        --text-secondary: #000;
        --bg-color: #fff;
        --surface-color: #f0f0f0;
    }
}