/* ============================================
   PDF AI Suite — Website Stylesheet
   pdfaisuite.com
   ============================================ */

/* --- CSS Variables --- */
:root {
    --violet: #7C3AED;
    --violet-light: #8B5CF6;
    --violet-dark: #6D28D9;
    --violet-bg: #F5F3FF;
    --bg: #FFFFFF;
    --bg-alt: #F9FAFB;
    --text: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border: #E5E7EB;
    --card-bg: #FFFFFF;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --card-shadow-hover: 0 10px 25px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --max-width: 1120px;
    --nav-height: 64px;
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --violet-bg: #1E1533;
        --bg: #0F0F13;
        --bg-alt: #18181B;
        --text: #F9FAFB;
        --text-secondary: #A1A1AA;
        --text-muted: #71717A;
        --border: #27272A;
        --card-bg: #1C1C21;
        --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
        --card-shadow-hover: 0 10px 25px rgba(0,0,0,0.4);
    }
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { color: var(--violet); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--violet-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* --- Container --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    height: var(--nav-height);
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}
@media (prefers-color-scheme: dark) {
    .navbar { background: rgba(15,15,19,0.85); }
}
.navbar .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 100%;
}
.nav-logo {
    font-size: 1.2rem; font-weight: 700; color: var(--text);
    display: flex; align-items: center; gap: 8px;
}
.nav-logo-icon {
    width: 32px; height: 32px; border-radius: 8px;
    background: linear-gradient(135deg, var(--violet), var(--violet-light));
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 16px; font-weight: 800;
}
.nav-logo-img {
    width: 32px; height: 32px; border-radius: 8px;
}
.hero-icon {
    width: 120px; height: 120px; border-radius: 24px;
    margin: 0 auto 24px;
    box-shadow: 0 8px 30px rgba(124,58,237,0.25);
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
    font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--violet); }
.nav-cta {
    background: var(--violet); color: white !important; padding: 8px 20px;
    border-radius: 20px; font-weight: 600; font-size: 0.85rem;
    transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover { background: var(--violet-dark); transform: translateY(-1px); }
.nav-hamburger {
    display: none; background: none; border: none; cursor: pointer;
    width: 32px; height: 32px; flex-direction: column;
    align-items: center; justify-content: center; gap: 5px;
}
.nav-hamburger span {
    width: 22px; height: 2px; background: var(--text);
    border-radius: 2px; transition: all 0.3s;
}

/* Mobile nav */
@media (max-width: 768px) {
    .nav-links {
        display: none; position: absolute; top: var(--nav-height);
        left: 0; right: 0; background: var(--bg);
        flex-direction: column; padding: 24px;
        border-bottom: 1px solid var(--border);
        gap: 20px;
    }
    .nav-links.active { display: flex; }
    .nav-hamburger { display: flex; }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--violet-bg) 0%, var(--bg) 100%);
}
.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
}
.hero h1 .gradient {
    background: linear-gradient(135deg, var(--violet), #A78BFA, var(--violet-light));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p {
    font-size: 1.2rem; color: var(--text-secondary);
    max-width: 560px; margin: 0 auto 32px;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px; border-radius: 12px;
    font-weight: 600; font-size: 1rem;
    transition: all 0.2s; cursor: pointer; border: none;
}
.btn-primary {
    background: var(--violet); color: white;
}
.btn-primary:hover { background: var(--violet-dark); transform: translateY(-2px); color: white; }
.btn-secondary {
    background: var(--card-bg); color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--violet); color: var(--violet); transform: translateY(-2px); }
.hero-badge {
    display: inline-block; padding: 6px 16px;
    background: var(--violet-bg); border: 1px solid var(--violet);
    border-radius: 20px; font-size: 0.8rem; font-weight: 600;
    color: var(--violet); margin-bottom: 20px;
}
@media (prefers-color-scheme: dark) {
    .hero-badge { background: rgba(124,58,237,0.15); }
}

/* Hero Screenshot */
.hero-screenshot {
    margin-top: 48px;
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}
.hero-screenshot-img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.08);
    border: 1px solid var(--border);
}
@media (prefers-color-scheme: dark) {
    .hero-screenshot-img {
        box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 1px 3px rgba(0,0,0,0.2);
        border-color: rgba(255,255,255,0.1);
    }
}

/* Screenshots Gallery */
.screenshots-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.screenshot-item {
    text-align: center;
}
.screenshot-item img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.06);
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}
.screenshot-item img:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}
.screenshot-item p {
    margin-top: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}
@media (prefers-color-scheme: dark) {
    .screenshot-item img {
        box-shadow: 0 4px 20px rgba(0,0,0,0.3);
        border-color: rgba(255,255,255,0.1);
    }
    .screenshot-item img:hover {
        box-shadow: 0 12px 40px rgba(0,0,0,0.4);
    }
}
@media (max-width: 768px) {
    .screenshots-gallery {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* ============================================
   Features Section
   ============================================ */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-header {
    text-align: center; margin-bottom: 48px;
}
.section-header h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700; letter-spacing: -0.02em;
    margin-bottom: 12px;
}
.section-header p {
    color: var(--text-secondary); font-size: 1.1rem;
    max-width: 560px; margin: 0 auto;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}
.feature-icon {
    width: 48px; height: 48px; border-radius: 12px;
    background: var(--violet-bg);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; margin-bottom: 16px;
}
.feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* ============================================
   Stats / Trust Bar
   ============================================ */
.stats-bar {
    display: flex; justify-content: center; gap: 48px;
    padding: 40px 0; flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--violet); }
.stat-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }

/* ============================================
   Platforms / Get the App Section
   ============================================ */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}
@media (max-width: 768px) {
    .platforms-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .platforms-grid { grid-template-columns: 1fr; max-width: 280px; }
}
.platform-card {
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 32px 24px; text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.platform-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}
.platform-disabled {
    opacity: 0.45;
}
.platform-disabled:hover {
    transform: none;
    box-shadow: none;
}
.platform-icon-wrap {
    width: 56px; height: 56px; border-radius: 14px;
    background: var(--violet-bg);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 4px; color: var(--violet);
}
.platform-card h3 {
    font-size: 1.15rem; font-weight: 700; margin: 0;
}
.platform-subtitle {
    font-size: 0.85rem; color: var(--text-secondary); margin: -4px 0 0;
}
.platform-status {
    display: inline-block; font-size: 0.72rem; font-weight: 600;
    padding: 4px 12px; border-radius: 12px;
    text-transform: uppercase; letter-spacing: 0.04em;
}
.status-available {
    background: #ECFDF5; color: #059669;
}
@media (prefers-color-scheme: dark) {
    .status-available { background: rgba(5,150,105,0.15); color: #34D399; }
}
.status-coming {
    background: var(--bg-alt); color: var(--text-muted);
    border: 1px solid var(--border);
}
.platform-btn {
    width: 100%; justify-content: center;
    margin-top: 8px; font-size: 0.9rem; padding: 12px 20px;
}

/* Features Included */
.features-included {
    margin-top: 48px; text-align: center;
}
.features-included h3 {
    font-size: 1.05rem; font-weight: 600;
    margin-bottom: 20px; color: var(--text-secondary);
}
.features-included-grid {
    display: flex; flex-wrap: wrap; justify-content: center;
    gap: 10px 24px; max-width: 720px; margin: 0 auto;
}
.features-included-grid span {
    font-size: 0.88rem; color: var(--text-secondary);
    display: flex; align-items: center; gap: 6px;
}
.features-included-grid span::before {
    content: "\2713"; color: var(--violet); font-weight: 700;
}

/* ============================================
   How It Works
   ============================================ */
.steps { display: flex; gap: 32px; flex-wrap: wrap; justify-content: center; }
.step {
    flex: 1; min-width: 240px; max-width: 340px;
    text-align: center; padding: 24px;
}
.step-number {
    width: 48px; height: 48px; border-radius: 50%;
    background: var(--violet); color: white;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; font-weight: 700;
    margin: 0 auto 16px;
}
.step h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.step p { color: var(--text-secondary); font-size: 0.9rem; }

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: 80px 0; text-align: center;
    background: linear-gradient(180deg, var(--bg) 0%, var(--violet-bg) 100%);
}
.cta-section h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700; margin-bottom: 16px;
}
.cta-section p {
    color: var(--text-secondary); font-size: 1.1rem;
    margin-bottom: 32px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-alt); border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px; margin-bottom: 40px;
}
@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 8px; }
.footer h4 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; color: var(--text-muted); }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: var(--text-secondary); font-size: 0.9rem; }
.footer ul li a:hover { color: var(--violet); }
.footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 24px; border-top: 1px solid var(--border);
    flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.8rem; }
.social-links { display: flex; gap: 16px; }
.social-links a {
    color: var(--text-muted); font-size: 0.85rem;
    transition: color 0.2s;
}
.social-links a:hover { color: var(--violet); }

/* ============================================
   Content Pages (Privacy, Terms, Help, API Key)
   ============================================ */
.page-header {
    padding: 120px 0 40px;
    background: linear-gradient(180deg, var(--violet-bg) 0%, var(--bg) 100%);
    text-align: center;
}
.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800; letter-spacing: -0.02em;
}
.page-header p {
    color: var(--text-secondary); margin-top: 8px; font-size: 1.05rem;
}
.page-content {
    max-width: 720px; margin: 0 auto;
    padding: 48px 24px 80px;
}
.page-content h2 {
    font-size: 1.5rem; font-weight: 700;
    margin: 40px 0 12px; padding-top: 20px;
    border-top: 1px solid var(--border);
}
.page-content h2:first-of-type { border-top: none; margin-top: 0; padding-top: 0; }
.page-content h3 {
    font-size: 1.15rem; font-weight: 600;
    margin: 24px 0 8px;
}
.page-content p { color: var(--text-secondary); margin-bottom: 16px; font-size: 0.95rem; }
.page-content ul, .page-content ol {
    margin: 12px 0 20px 24px;
}
.page-content ul { list-style: disc; }
.page-content ol { list-style: decimal; }
.page-content li {
    color: var(--text-secondary); font-size: 0.95rem;
    margin-bottom: 8px; padding-left: 4px;
}
.page-content a { color: var(--violet); font-weight: 500; }
.page-content code {
    background: var(--bg-alt); padding: 2px 8px;
    border-radius: 4px; font-size: 0.85rem;
    border: 1px solid var(--border);
}
.page-content .info-box {
    background: var(--violet-bg); border: 1px solid var(--violet);
    border-radius: var(--radius-sm); padding: 16px 20px;
    margin: 20px 0; font-size: 0.9rem;
}
.last-updated {
    color: var(--text-muted); font-size: 0.8rem;
    font-style: italic; margin-top: 40px;
    padding-top: 20px; border-top: 1px solid var(--border);
}

/* ============================================
   Chatbot
   ============================================ */

/* Pulse animation for chatbot button */
@keyframes chatPulse {
    0% { box-shadow: 0 4px 12px rgba(124,58,237,0.4), 0 0 0 0 rgba(124,58,237,0.4); }
    70% { box-shadow: 0 4px 12px rgba(124,58,237,0.4), 0 0 0 12px rgba(124,58,237,0); }
    100% { box-shadow: 0 4px 12px rgba(124,58,237,0.4), 0 0 0 0 rgba(124,58,237,0); }
}
@keyframes chatBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

.chatbot-area {
    position: fixed; bottom: 24px; right: 24px; z-index: 1000;
    display: flex; align-items: flex-end; gap: 12px;
}

/* Notification bubble */
.chatbot-bubble {
    background: var(--card-bg); color: var(--text);
    padding: 10px 16px; border-radius: 12px; border-bottom-right-radius: 4px;
    font-size: 0.85rem; font-weight: 500;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    border: 1px solid var(--border);
    animation: fadeInUp 0.5s ease-out 2s both;
    cursor: pointer; max-width: 200px;
    line-height: 1.4;
    transition: opacity 0.3s;
}
.chatbot-bubble.hidden { opacity: 0 !important; pointer-events: none; transform: translateY(10px); }
@media (prefers-color-scheme: dark) {
    .chatbot-bubble { box-shadow: 0 4px 20px rgba(0,0,0,0.4); }
}
.chatbot-bubble .sparkle { color: var(--violet); }

.chatbot-toggle {
    width: 56px; height: 56px; border-radius: 50%;
    background: var(--violet); color: white; border: none;
    cursor: pointer; font-size: 24px;
    box-shadow: 0 4px 12px rgba(124,58,237,0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    animation: chatPulse 2s ease-in-out infinite 3s;
}
.chatbot-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(124,58,237,0.5);
    animation: none;
}
.chatbot-toggle.no-pulse { animation: none; }

/* Label under toggle */
.chatbot-label {
    position: absolute; bottom: -22px; left: 50%; transform: translateX(-50%);
    font-size: 0.65rem; font-weight: 700; color: var(--violet);
    white-space: nowrap; text-transform: uppercase; letter-spacing: 0.05em;
    opacity: 0; animation: fadeInUp 0.4s ease-out 2.5s both;
}
.chatbot-label.hidden { display: none; }

/* Typing indicator */
.typing-indicator { display: flex; gap: 4px; padding: 12px 16px; align-items: center; }
.typing-indicator .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--text-muted); opacity: 0.5;
    animation: typingBounce 1.4s ease-in-out infinite;
}
.typing-indicator .dot:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator .dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
    30% { transform: translateY(-6px); opacity: 1; }
}
.chatbot-window {
    display: none; position: fixed;
    bottom: 92px; right: 24px; z-index: 1000;
    width: 380px; max-height: 520px;
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: 16px; overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    flex-direction: column;
}
.chatbot-window.active { display: flex; }
@media (prefers-color-scheme: dark) {
    .chatbot-window { box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
}
@media (max-width: 480px) {
    .chatbot-window { width: calc(100vw - 32px); right: 16px; bottom: 88px; max-height: 70vh; }
}
.chatbot-header {
    background: var(--violet); color: white;
    padding: 16px 20px; display: flex;
    align-items: center; justify-content: space-between;
}
.chatbot-header h4 { font-size: 0.95rem; font-weight: 600; }
.chatbot-close {
    background: none; border: none; color: white;
    font-size: 20px; cursor: pointer; opacity: 0.8;
    transition: opacity 0.2s;
}
.chatbot-close:hover { opacity: 1; }
.chatbot-messages {
    flex: 1; overflow-y: auto; padding: 16px;
    display: flex; flex-direction: column; gap: 12px;
    max-height: 360px;
}
.chat-msg {
    max-width: 85%; padding: 10px 14px;
    border-radius: 12px; font-size: 0.88rem;
    line-height: 1.5;
}
.chat-msg.bot {
    background: var(--bg-alt); color: var(--text);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}
.chat-msg.user {
    background: var(--violet); color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}
.chatbot-suggestions {
    padding: 8px 16px 12px; display: flex;
    flex-wrap: wrap; gap: 6px;
}
.chatbot-suggestions button {
    background: var(--bg-alt); border: 1px solid var(--border);
    border-radius: 16px; padding: 6px 12px;
    font-size: 0.78rem; color: var(--text-secondary);
    cursor: pointer; transition: all 0.2s; font-family: var(--font);
}
.chatbot-suggestions button:hover {
    border-color: var(--violet); color: var(--violet);
}
.chatbot-input {
    display: flex; border-top: 1px solid var(--border);
    padding: 12px;
}
.chatbot-input input {
    flex: 1; border: 1px solid var(--border);
    border-radius: 8px; padding: 10px 14px;
    font-size: 0.88rem; background: var(--bg);
    color: var(--text); outline: none;
    font-family: var(--font);
}
.chatbot-input input:focus { border-color: var(--violet); }
.chatbot-input button {
    background: var(--violet); color: white; border: none;
    border-radius: 8px; padding: 10px 16px;
    margin-left: 8px; cursor: pointer;
    font-weight: 600; font-size: 0.88rem;
    transition: background 0.2s; font-family: var(--font);
}
.chatbot-input button:hover { background: var(--violet-dark); }

/* ============================================
   Utility
   ============================================ */
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mb-4 { margin-bottom: 32px; }