/* ==========================================
   TikTok Comment Generator - Main Stylesheet
   ========================================== */

/* --- CSS Variables --- */
:root {
    --primary: #FE2C55;
    --primary-dark: #E5193F;
    --accent: #25F4EE;
    --accent-dark: #1AD4D0;
    --dark: #161823;
    --dark-light: #2F2F3E;
    --gray-900: #1a1a2e;
    --gray-800: #2d2d44;
    --gray-700: #404060;
    --gray-600: #5a5a7a;
    --gray-500: #8a8aa0;
    --gray-400: #a0a0b8;
    --gray-300: #c8c8d8;
    --gray-200: #e4e4ee;
    --gray-100: #f2f2f8;
    --gray-50: #f8f8fc;
    --white: #ffffff;
    --success: #00C853;
    --error: #FF1744;
    --warning: #FF9100;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
    --transition: 0.25s ease;
    --max-width: 1200px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--dark); }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
p { margin-bottom: 1rem; }
::selection { background: var(--accent); color: var(--dark); }

/* --- Utility --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 800px; }
.section { padding: 80px 0; }
.required { color: var(--primary); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    justify-content: center;
    line-height: 1.4;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: var(--white); }
.btn-secondary { background: var(--dark); color: var(--white); border-color: var(--dark); }
.btn-secondary:hover { background: var(--dark-light); border-color: var(--dark-light); color: var(--white); }
.btn-outline { background: transparent; color: var(--dark); border-color: var(--gray-300); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-danger { background: var(--error); color: var(--white); border-color: var(--error); }
.btn-danger:hover { opacity: 0.9; color: var(--white); }
.btn-store {
    background: var(--dark);
    color: var(--white);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    gap: 10px;
}
.btn-store:hover { background: var(--dark-light); color: var(--white); }
.btn-store span { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.2; }
.btn-store small { font-size: 0.65rem; font-weight: 400; opacity: 0.8; }
.btn-store svg { flex-shrink: 0; }

/* --- Forms --- */
.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--dark);
    background: var(--white);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,244,238,0.15); }
textarea.form-control { resize: vertical; }
select.form-control { cursor: pointer; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.9rem; color: var(--gray-700); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.file-input { display: none; }

/* --- Alerts --- */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}
.alert ul { margin: 0; padding: 0; }
.alert ul li { margin-bottom: 4px; }
.alert-success { background: #E8F5E9; color: #2E7D32; border: 1px solid #A5D6A7; }
.alert-error { background: #FFEBEE; color: #C62828; border: 1px solid #EF9A9A; }

/* --- Toggle Switch --- */
.toggle-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    user-select: none;
}
.toggle-label input { display: none; }
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--gray-300);
    border-radius: 24px;
    transition: background var(--transition);
    flex-shrink: 0;
}
.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: var(--white);
    border-radius: 50%;
    transition: transform var(--transition);
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}
.toggle-label input:checked + .toggle-switch { background: var(--accent); }
.toggle-label input:checked + .toggle-switch::after { transform: translateX(20px); }

/* ==========================================
   NAVBAR
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow); }
.navbar-container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.navbar-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.navbar-logo { height: 36px; width: auto; }
.navbar-title { font-weight: 700; font-size: 1.1rem; color: var(--dark); }
.navbar-menu { display: flex; align-items: center; gap: 8px; }
.navbar-menu li a {
    display: inline-block;
    padding: 8px 16px;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.navbar-menu li a:hover, .navbar-menu li a.active { color: var(--primary); background: rgba(254,44,85,0.06); }
.nav-cta { background: var(--primary) !important; color: var(--white) !important; }
.nav-cta:hover { background: var(--primary-dark) !important; }
.navbar-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.navbar-toggle span { display: block; width: 22px; height: 2px; background: var(--dark); margin: 5px 0; border-radius: 2px; transition: all var(--transition); }

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f8f8fc 0%, #eef8f8 50%, #fef6f8 100%);
    overflow: hidden;
}
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, var(--dark) 0%, var(--gray-800) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle { font-size: 1.15rem; color: var(--gray-600); margin-bottom: 2rem; line-height: 1.7; max-width: 540px; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; }

/* Hero Mockup */
.hero-visual { display: flex; justify-content: center; }
.mockup-phone {
    width: 280px;
    background: var(--dark);
    border-radius: 32px;
    padding: 16px 12px;
    box-shadow: var(--shadow-lg);
    position: relative;
}
.mockup-screen { background: var(--white); border-radius: 20px; padding: 20px 16px; }
.mockup-comment { display: flex; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--gray-100); }
.mockup-comment:last-child { border-bottom: none; }
.mockup-avatar { width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--primary)); flex-shrink: 0; }
.mockup-avatar-2 { background: linear-gradient(135deg, #FF6B6B, #FFD93D); }
.mockup-body { flex: 1; min-width: 0; }
.mockup-username { font-weight: 700; font-size: 0.8rem; color: var(--dark); }
.mockup-badge { color: var(--accent); font-size: 0.7rem; margin-left: 2px; }
.mockup-text { font-size: 0.8rem; color: var(--gray-700); margin: 4px 0; line-height: 1.4; }
.mockup-meta { font-size: 0.65rem; color: var(--gray-500); }
.mockup-heart { font-size: 0.7rem; color: var(--primary); white-space: nowrap; flex-shrink: 0; margin-top: 8px; }

/* ==========================================
   SECTIONS
   ========================================== */
.section-header { text-align: center; max-width: 640px; margin: 0 auto 3.5rem; }
.section-header h2 { margin-bottom: 0.75rem; }
.section-header p { color: var(--gray-600); font-size: 1.05rem; }

/* Features */
.features-section { background: var(--white); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.feature-card h3 { margin-bottom: 0.5rem; font-size: 1.15rem; }
.feature-card p { color: var(--gray-600); font-size: 0.9rem; margin-bottom: 0; }

/* How It Works */
.how-it-works-section { background: var(--gray-50); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.step-card { text-align: center; padding: 24px; }
.step-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 auto 1rem;
}
.step-card h3 { margin-bottom: 0.5rem; }
.step-card p { color: var(--gray-600); font-size: 0.9rem; margin-bottom: 0; }

/* Benefits */
.benefits-section { background: var(--white); }
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.benefit-item { padding: 28px 24px; border-radius: var(--radius); background: var(--gray-50); border: 1px solid var(--gray-200); transition: all var(--transition); }
.benefit-item:hover { box-shadow: var(--shadow); border-color: transparent; }
.benefit-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.benefit-item h3 { margin-bottom: 0.5rem; font-size: 1.1rem; }
.benefit-item p { color: var(--gray-600); font-size: 0.9rem; margin-bottom: 0; }

/* FAQ */
.faq-section { background: var(--gray-50); }
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { margin-bottom: 8px; border-radius: var(--radius-sm); background: var(--white); border: 1px solid var(--gray-200); overflow: hidden; }
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    text-align: left;
    gap: 12px;
}
.faq-question:hover { color: var(--primary); }
.faq-arrow { transition: transform var(--transition); flex-shrink: 0; }
.faq-item.active .faq-arrow { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; }
.faq-answer p { padding: 0 20px 18px; color: var(--gray-600); font-size: 0.95rem; line-height: 1.7; margin: 0; }
.faq-item.active .faq-answer { max-height: 500px; }

/* CTA */
.cta-section {
    background: linear-gradient(135deg, var(--dark) 0%, var(--gray-900) 100%);
    color: var(--white);
    text-align: center;
}
.cta-content h2 { color: var(--white); margin-bottom: 1rem; font-size: 2.2rem; }
.cta-content p { color: var(--gray-400); font-size: 1.1rem; margin-bottom: 2rem; }
.cta-buttons { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ==========================================
   GENERATOR PAGE
   ========================================== */
.breadcrumb-bar { padding: 88px 0 0; background: var(--gray-50); }
.breadcrumb { padding: 12px 0; font-size: 0.85rem; color: var(--gray-500); }
.breadcrumb a { color: var(--gray-600); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { margin: 0 8px; }

.generator-intro { padding: 40px 0 0; background: var(--gray-50); text-align: center; }
.generator-intro h1 { margin-bottom: 1rem; }
.generator-description { max-width: 720px; margin: 0 auto; color: var(--gray-600); font-size: 1.05rem; }

.generator-section { padding: 40px 0 80px; background: var(--gray-50); }
.generator-layout { display: grid; grid-template-columns: 380px 1fr; gap: 32px; align-items: start; }
.generator-controls {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 88px;
}
.controls-title { font-size: 1.15rem; margin-bottom: 1.5rem; padding-bottom: 0.75rem; border-bottom: 2px solid var(--gray-100); }
.control-group { margin-bottom: 1rem; }
.control-group label { display: block; margin-bottom: 4px; font-weight: 600; font-size: 0.85rem; color: var(--gray-700); }
.control-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.profile-upload { display: flex; align-items: center; gap: 12px; }
.profile-preview {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 2px solid var(--gray-200);
    flex-shrink: 0;
}
.profile-preview img { width: 100%; height: 100%; object-fit: cover; }

.control-buttons { display: flex; gap: 8px; margin-top: 1.5rem; flex-wrap: wrap; }
.control-buttons .btn { flex: 1; min-width: 120px; }

/* Preview */
.generator-preview-wrapper { position: sticky; top: 88px; }
.preview-title { font-size: 1.15rem; margin-bottom: 1rem; color: var(--gray-700); }
.preview-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    min-height: 160px;
}

/* TikTok Comment Preview Styles */
.tiktok-comment { font-family: var(--font); padding: 8px 0; }
.tt-pinned {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--gray-500);
    font-size: 0.75rem;
    margin-bottom: 8px;
    padding-left: 46px;
}
.tt-comment-body { display: flex; gap: 10px; align-items: flex-start; }
.tt-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gray-200);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.tt-avatar img { width: 100%; height: 100%; object-fit: cover; }
.tt-content { flex: 1; min-width: 0; }
.tt-header { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.tt-username { font-weight: 600; font-size: 0.85rem; color: var(--gray-700); }
.tt-verified svg { vertical-align: middle; }
.tt-dot { color: var(--gray-400); font-size: 0.75rem; }
.tt-time { color: var(--gray-500); font-size: 0.75rem; }
.tt-text { font-size: 0.9rem; color: var(--dark); margin: 4px 0 6px; line-height: 1.5; word-break: break-word; }
.tt-footer { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.tt-creator-liked { display: flex; align-items: center; gap: 4px; font-size: 0.75rem; color: var(--gray-500); }
.tt-replies { font-size: 0.8rem; color: var(--gray-500); font-weight: 500; }
.tt-like-area { display: flex; flex-direction: column; align-items: center; gap: 2px; margin-left: auto; padding-top: 4px; flex-shrink: 0; }
.tt-heart { cursor: default; }
.tt-likes-count { font-size: 0.7rem; color: var(--gray-500); }

.download-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px;
    color: var(--gray-600);
    font-size: 0.9rem;
}
.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Tool Info */
.tool-info-section { background: var(--white); }
.tool-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.tool-info-card { background: var(--gray-50); border-radius: var(--radius-lg); padding: 32px; border: 1px solid var(--gray-200); }
.tool-info-card h2 { font-size: 1.3rem; margin-bottom: 1rem; }
.tool-info-card p { color: var(--gray-600); font-size: 0.95rem; line-height: 1.7; }
.tool-uses-list { list-style: none; }
.tool-uses-list li { padding: 8px 0; color: var(--gray-600); font-size: 0.95rem; line-height: 1.6; border-bottom: 1px solid var(--gray-100); }
.tool-uses-list li:last-child { border-bottom: none; }

/* ==========================================
   PAGES (About, Privacy, Contact)
   ========================================== */
.page-section { padding-top: 100px; }
.page-section h1 { margin-bottom: 1rem; }
.page-intro { color: var(--gray-600); font-size: 1.05rem; margin-bottom: 2rem; }
.page-content { color: var(--gray-700); line-height: 1.8; }
.page-content h2 { margin-top: 2rem; margin-bottom: 0.75rem; font-size: 1.4rem; }
.page-content h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; font-size: 1.15rem; }
.page-content ul, .page-content ol { margin: 1rem 0; padding-left: 1.5rem; }
.page-content ul { list-style: disc; }
.page-content ol { list-style: decimal; }
.page-content li { margin-bottom: 0.5rem; }
.page-content a { color: var(--primary); text-decoration: underline; }
.page-content a:hover { color: var(--primary-dark); }

/* Contact */
.contact-layout { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; }
.contact-form .form-group { margin-bottom: 1.25rem; }
.contact-info { background: var(--gray-50); border-radius: var(--radius-lg); padding: 28px 24px; border: 1px solid var(--gray-200); height: fit-content; }
.contact-info h3 { margin-bottom: 1.25rem; font-size: 1.15rem; }
.contact-info-item { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 1.25rem; }
.contact-info-item svg { flex-shrink: 0; margin-top: 2px; color: var(--primary); }
.contact-info-item strong { display: block; font-size: 0.85rem; color: var(--gray-600); margin-bottom: 2px; }
.contact-info-item a, .contact-info-item span { color: var(--dark); font-size: 0.95rem; }
.contact-info-note { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--gray-200); }
.contact-info-note p { color: var(--gray-500); font-size: 0.85rem; margin: 0; }

/* ==========================================
   FOOTER
   ========================================== */
.footer { background: var(--dark); color: var(--gray-400); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand h3 { color: var(--white); margin-bottom: 0.75rem; font-size: 1.2rem; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; }
.footer-social { display: flex; gap: 12px; margin-top: 1rem; }
.footer-social a { color: var(--gray-400); transition: color var(--transition); }
.footer-social a:hover { color: var(--accent); }
.footer-links h4 { color: var(--white); margin-bottom: 1rem; font-size: 0.95rem; }
.footer-links ul li { margin-bottom: 8px; }
.footer-links a { color: var(--gray-400); font-size: 0.9rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-email { margin-top: 1rem; }
.footer-email a { color: var(--accent); font-size: 0.9rem; }
.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
}
.footer-disclaimer { font-size: 0.78rem; color: var(--gray-600); margin-top: 6px; margin-bottom: 0; }

/* ==========================================
   AD CONTAINERS
   ========================================== */
.ad-container { max-width: var(--max-width); margin: 20px auto; padding: 0 20px; text-align: center; min-height: 10px; }

/* ==========================================
   404 PAGE
   ========================================== */
.error-page { min-height: 60vh; display: flex; align-items: center; }