/* ==========================================================================
   Dolfin AI Landing Page - Fresh Design
   ========================================================================== */

/* --------------------------------------------------------------------------
   Variables
   -------------------------------------------------------------------------- */
:root {
    --bg-dark: #0A0F1C;
    --bg-card: #111827;
    --bg-card-hover: #1F2937;
    --accent: #14B8A6;
    --accent-light: #5EEAD4;
    --accent-glow: rgba(20, 184, 166, 0.3);
    --text: #F9FAFB;
    --text-muted: #9CA3AF;
    --border: rgba(255, 255, 255, 0.1);
    --gradient: linear-gradient(135deg, #14B8A6 0%, #0EA5E9 100%);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

/* --------------------------------------------------------------------------
   Gradient Text
   -------------------------------------------------------------------------- */
.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 15, 28, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
}

.logo-icon {
    width: 36px;
    height: 36px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-download {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--gradient);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.nav-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.nav-download svg {
    width: 18px;
    height: 18px;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-dark);
    padding: 100px 24px 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    list-style: none;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mobile-nav-links a {
    font-size: 24px;
    font-weight: 600;
    color: var(--text);
    transition: var(--transition);
}

.mobile-nav-links a:hover {
    color: var(--accent);
}

.mobile-download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: var(--gradient);
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
}

.mobile-download-btn svg {
    width: 24px;
    height: 24px;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.1;
    filter: blur(120px);
    top: -200px;
    right: -100px;
    animation: float 5s ease-in-out infinite;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    top: auto;
    bottom: -100px;
    left: -100px;
    right: auto;
    animation-delay: -2.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(20, 184, 166, 0.1);
    border: 1px solid rgba(20, 184, 166, 0.3);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

.pulse {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.15); }
}

.hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 480px;
}

/* Play Store Button */
.play-store-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background: #000;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    transition: var(--transition);
}

.play-store-btn:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.play-store-btn svg {
    width: 28px;
    height: 28px;
}

.play-store-btn .small {
    display: block;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.8;
}

.play-store-btn .large {
    display: block;
    font-size: 18px;
    font-weight: 600;
}

.play-store-btn-large {
    padding: 18px 36px;
}

.play-store-btn-large svg {
    width: 32px;
    height: 32px;
}

.play-store-btn-large .large {
    font-size: 20px;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Hero Phone */
.hero-phone {
    display: flex;
    justify-content: center;
}

.phone-frame {
    width: 280px;
    background: linear-gradient(180deg, #1F2937 0%, #111827 100%);
    border-radius: 36px;
    padding: 12px;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 25px 50px rgba(0, 0, 0, 0.5),
        0 0 100px var(--accent-glow);
    animation: phoneFloat 4s ease-in-out infinite;
}

@keyframes phoneFloat {
    0%, 100% { transform: translateY(0) rotate(1.5deg); }
    50% { transform: translateY(-10px) rotate(-0.5deg); }
}

.phone-screen {
    background: var(--bg-dark);
    border-radius: 28px;
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.chat-avatar {
    font-size: 28px;
}

.chat-name {
    font-size: 14px;
    font-weight: 600;
}

.chat-status {
    font-size: 12px;
    color: var(--accent);
}

.chat-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 320px;
}

.msg {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 13px;
    line-height: 1.5;
    animation: msgAppear 0.3s ease backwards;
}

.msg.user {
    align-self: flex-end;
    background: var(--gradient);
    border-bottom-right-radius: 4px;
}

.msg.ai {
    align-self: flex-start;
    background: var(--bg-card);
    border-bottom-left-radius: 4px;
}

.msg:nth-child(1) { animation-delay: 0.2s; }
.msg:nth-child(2) { animation-delay: 0.5s; }
.msg:nth-child(3) { animation-delay: 0.8s; }
.msg:nth-child(4) { animation-delay: 1.1s; }
.msg:nth-child(5) { animation-delay: 1.4s; }

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

/* Typing Indicator */
.msg.typing {
    display: flex;
    gap: 4px;
    padding: 14px 18px;
}

.msg.typing span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typingBounce 1s infinite;
}

.msg.typing span:nth-child(2) { animation-delay: 0.15s; }
.msg.typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

/* --------------------------------------------------------------------------
   Section Styles
   -------------------------------------------------------------------------- */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(20, 184, 166, 0.1);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 18px;
}

/* --------------------------------------------------------------------------
   Features
   -------------------------------------------------------------------------- */
.features {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 50%, var(--bg-dark) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(20, 184, 166, 0.3);
    transform: translateY(-5px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.2) 0%, rgba(14, 165, 233, 0.2) 100%);
    border-radius: 12px;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 24px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
}

/* --------------------------------------------------------------------------
   How It Works
   -------------------------------------------------------------------------- */
.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.step {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.step:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.step-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: 50%;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.step-content p {
    color: var(--text-muted);
    font-size: 14px;
}

.step-arrow {
    font-size: 24px;
    color: var(--accent);
}

.cta-center {
    text-align: center;
}

/* --------------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------------- */
.testimonials {
    background: var(--bg-card);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.testimonial {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.testimonial:hover {
    border-color: rgba(20, 184, 166, 0.3);
}

.stars {
    color: #FBBF24;
    font-size: 18px;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.testimonial > p {
    font-size: 16px;
    margin-bottom: 24px;
    line-height: 1.7;
}

.author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: 50%;
    font-size: 14px;
    font-weight: 600;
}

.author .name {
    font-weight: 600;
    font-size: 15px;
}

.author .role {
    color: var(--text-muted);
    font-size: 13px;
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    background: none;
    border: none;
    color: var(--text);
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: var(--transition);
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
}

.faq-item.open .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding-bottom: 24px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Final CTA
   -------------------------------------------------------------------------- */
.final-cta {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0D1424 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--accent);
    opacity: 0.05;
    border-radius: 50%;
    filter: blur(100px);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 32px;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: #060A14;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

.footer-brand .logo {
    margin-bottom: 12px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 13px;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 60px;
    }

    .hero-text {
        order: 1;
    }

    .hero-phone {
        order: 2;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .play-store-btn {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-download {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    section {
        padding: 60px 0;
    }

    .steps {
        flex-direction: column;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .step {
        width: 100%;
        max-width: 320px;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .phone-frame {
        width: 240px;
    }

    .chat-body {
        min-height: 260px;
    }

    .msg {
        font-size: 12px;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat-number {
        font-size: 20px;
    }
}