/* === RESET & BASE === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #e0e7ff;
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* === NAVBAR === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s;
}
.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    padding: 10px 0;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    white-space: nowrap;
}
.nav-logo span { color: var(--primary-300); }
.nav-logo-mark { flex-shrink: 0; display: block; }
.navbar.scrolled .nav-logo { color: var(--gray-900); }
.navbar.scrolled .nav-logo span { color: var(--primary); }

.nav-links {
    display: flex;
    gap: 28px;
    flex: 1;
    justify-content: center;
}
.nav-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }
.navbar.scrolled .nav-links a { color: var(--gray-600); }
.navbar.scrolled .nav-links a:hover { color: var(--gray-900); }

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

.nav-btn {
    padding: 8px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
}
.nav-btn-ghost {
    color: rgba(255,255,255,0.9);
}
.nav-btn-ghost:hover { color: #fff; }
.navbar.scrolled .nav-btn-ghost { color: var(--gray-700); }

.nav-btn-primary {
    background: var(--primary);
    color: #fff;
}
.nav-btn-primary:hover { background: var(--primary-dark); }

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-hamburger span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: all 0.3s;
    border-radius: 2px;
}
.navbar.scrolled .nav-hamburger span { background: var(--gray-700); }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === HERO === */
.hero {
    background: var(--gray-900);
    padding: 140px 0 100px;
    overflow: hidden;
    position: relative;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}
.hero-title span { color: var(--primary-400); }

.hero-subtitle {
    font-size: 18px;
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-btn {
    padding: 14px 28px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
}
.hero-btn-primary {
    background: var(--primary);
    color: #fff;
}
.hero-btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.hero-btn-outline {
    border: 1px solid rgba(255,255,255,0.3);
    color: #fff;
}
.hero-btn-outline:hover { border-color: rgba(255,255,255,0.6); background: rgba(255,255,255,0.05); }

/* === HERO MOCKUP === */
.hero-mockup {
    display: flex;
    justify-content: center;
}

.mockup-widget {
    width: 340px;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

.mockup-header {
    background: var(--primary);
    color: #fff;
    padding: 16px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.mockup-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}
.mockup-header strong { font-size: 14px; }
.mockup-header small { opacity: 0.75; font-size: 12px; }

.mockup-messages {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 260px;
}

.mockup-msg {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 13px;
    line-height: 1.5;
}
.mockup-msg-welcome {
    text-align: center;
    padding: 14px;
    color: var(--gray-500);
    font-size: 13px;
    max-width: 100%;
}
.mockup-msg-welcome strong {
    display: block;
    color: var(--gray-800);
    margin-bottom: 4px;
}
.mockup-msg-user {
    align-self: flex-end;
    background: var(--primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}
.mockup-msg-bot {
    align-self: flex-start;
    background: var(--gray-100);
    color: var(--gray-800);
    border-bottom-left-radius: 4px;
}
.mockup-msg-typing {
    align-self: flex-start;
    background: var(--gray-100);
    padding: 12px 16px;
    border-bottom-left-radius: 4px;
}

.typing-dots {
    display: flex;
    gap: 4px;
}
.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite ease-in-out both;
}
.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }
@keyframes typingBounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

.mockup-input {
    padding: 12px 16px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.mockup-input span {
    color: var(--gray-400);
    font-size: 13px;
}
.mockup-send {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary);
}

/* Hero animation */
.mockup-anim { opacity: 0; transform: translateY(10px); }
.mockup-anim-1 { animation: msgAppear 0.5s ease 1s forwards; }
.mockup-anim-2 { animation: msgAppear 0.3s ease 2s forwards, msgDisappear 0.3s ease 3.5s forwards; }
.mockup-anim-3 { animation: msgAppear 0.5s ease 3.6s forwards; }

@keyframes msgAppear {
    to { opacity: 1; transform: translateY(0); }
}
@keyframes msgDisappear {
    to { opacity: 0; height: 0; padding: 0; margin: 0; overflow: hidden; }
}

/* === SECTIONS === */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.section-header p {
    font-size: 18px;
    color: var(--gray-500);
}
.section-header-light h2 { color: #fff; }
.section-header-light p { color: var(--gray-400); }

/* === HOW IT WORKS === */
.how-it-works {
    padding: 100px 0;
    background: #fff;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step-card {
    text-align: center;
    padding: 32px 24px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: all 0.3s;
    position: relative;
}
.step-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: var(--primary-50);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 16px auto 16px;
}

.step-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}
.step-card p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
}

/* === FEATURES === */
.features {
    padding: 100px 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    padding: 28px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--gray-200);
    transition: all 0.3s;
}
.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-lg);
    background: var(--primary-50);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}
.feature-card p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
}

/* === SHOWCASE === */
.showcase {
    padding: 100px 0;
    background: var(--gray-900);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.showcase-widget {
    text-align: center;
}

.sw-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-400);
    margin-bottom: 12px;
}

.sw-window {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    transition: transform 0.3s;
}
.sw-window:hover { transform: translateY(-4px); }

.sw-header {
    padding: 14px 16px;
}
.sw-header strong { font-size: 14px; }

.sw-body {
    padding: 16px;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sw-msg {
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 12px;
    line-height: 1.5;
}
.sw-msg-bot { align-self: flex-start; max-width: 80%; }
.sw-msg-user { align-self: flex-end; max-width: 80%; }

/* === PRICING === */
.pricing {
    padding: 100px 0;
    background: #fff;
}

.pricing-card {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
    padding: 40px;
    border: 2px solid var(--primary-200);
    border-radius: var(--radius-xl);
    position: relative;
    background: #fff;
    box-shadow: 0 4px 20px rgba(99,102,241,0.1);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 4px 20px;
    border-radius: 99px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.pricing-amount {
    margin: 20px 0 28px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
}
.pricing-currency {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-500);
    margin-top: 8px;
}
.pricing-number {
    font-size: 64px;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1;
}
.pricing-period {
    font-size: 16px;
    color: var(--gray-500);
    align-self: flex-end;
    margin-bottom: 8px;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 28px;
}
.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 15px;
    color: var(--gray-700);
}
.pricing-features li svg { color: var(--primary); flex-shrink: 0; }

.pricing .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    transition: all 0.2s;
    width: 100%;
}
.pricing .btn-primary { background: var(--primary); color: #fff; }
.pricing .btn-primary:hover { background: var(--primary-dark); }

/* === FAQ === */
.faq {
    padding: 100px 0;
    background: var(--gray-50);
}

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

.faq-item {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: 12px;
    overflow: hidden;
    transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }

.faq-item summary {
    padding: 18px 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+';
    font-size: 20px;
    color: var(--gray-400);
    font-weight: 400;
    transition: transform 0.2s;
}
.faq-item[open] summary::after {
    content: '−';
    color: var(--primary);
}

.faq-answer {
    padding: 0 20px 18px;
}
.faq-answer p {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* === FOOTER === */
.landing-footer {
    background: var(--gray-900);
    padding: 60px 0 0;
    color: var(--gray-400);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 40px;
    display: flex;
    justify-content: space-between;
    gap: 40px;
}

.footer-brand-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}
.footer-logo-mark { flex-shrink: 0; display: block; }
.footer-brand h3 {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin: 0;
}
.footer-brand h3 span { color: var(--primary-400); }
.footer-brand p {
    font-size: 14px;
    color: var(--gray-500);
}

.footer-links {
    display: flex;
    gap: 60px;
}
.footer-col h4 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    margin-bottom: 12px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--gray-400);
    padding: 4px 0;
    text-decoration: none;
    transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 24px;
    text-align: center;
    font-size: 13px;
    color: var(--gray-600);
}

/* === FOCUS & ACCESSIBILITY === */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* === SCROLL REVEAL === */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .hero-title { font-size: 40px; }
    .hero-container { gap: 40px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .showcase-grid { grid-template-columns: repeat(2, 1fr); }
    .showcase-grid .showcase-widget:nth-child(3) {
        grid-column: 1 / -1;
        max-width: 340px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-actions { display: none; }
    .nav-hamburger { display: flex; }

    .nav-links.open, .nav-actions.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        padding: 20px 24px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    }
    .nav-links.open a { color: var(--gray-700); padding: 8px 0; }
    .nav-actions.open { border-top: 1px solid var(--gray-200); }
    .nav-actions.open .nav-btn-ghost { color: var(--gray-700); }

    .hero { padding: 120px 0 60px; }
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-title { font-size: 34px; }
    .hero-subtitle { margin: 0 auto 30px; font-size: 16px; }
    .hero-actions { justify-content: center; }
    .hero-mockup { display: none; }

    .section-header h2 { font-size: 28px; }
    .section-header p { font-size: 16px; }

    .steps-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .features-grid { grid-template-columns: 1fr; }
    .showcase-grid { grid-template-columns: 1fr; max-width: 340px; margin: 0 auto; }
    .showcase-grid .showcase-widget:nth-child(3) { max-width: 100%; }

    .footer-container { flex-direction: column; }
    .footer-links { gap: 40px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 28px; }
    .hero-btn { width: 100%; justify-content: center; }
    .pricing-card { padding: 28px 20px; }
    .pricing-number { font-size: 48px; }
}

/* === LOGIN MODAL === */
body.auth-modal-open {
    overflow: hidden;
}

.login-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.login-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.login-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
}

.login-modal-panel {
    position: relative;
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.04);
    padding: 32px 28px 28px;
    max-height: min(90vh, 640px);
    overflow-y: auto;
    animation: loginModalIn 0.25s ease;
}

@keyframes loginModalIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-modal-x {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 24px;
    line-height: 1;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.login-modal-x:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

.login-modal-title {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    margin: 0 0 8px;
    padding-right: 36px;
}

.login-modal-lead {
    font-size: 14px;
    color: var(--gray-500);
    margin: 0 0 20px;
    line-height: 1.5;
}

.login-modal-errors {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    border-radius: var(--radius);
    padding: 12px 14px;
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 1.45;
}
.login-modal-errors[hidden] {
    display: none !important;
}

.login-modal-field {
    margin-bottom: 16px;
}
.login-modal-field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.login-modal-field input {
    width: 100%;
    padding: 11px 14px;
    font-size: 15px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.login-modal-field input:focus {
    outline: none;
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.login-modal-submit {
    width: 100%;
    margin-top: 8px;
    padding: 12px 16px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    color: #fff;
    background: var(--primary);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}
.login-modal-submit:hover:not(:disabled) {
    background: var(--primary-dark);
}
.login-modal-submit:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.login-modal-footer {
    margin: 20px 0 0;
    text-align: center;
    font-size: 14px;
    color: var(--gray-500);
}
.login-modal-footer a {
    color: var(--primary-600);
    font-weight: 600;
    text-decoration: none;
}
.login-modal-footer a:hover {
    text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
    .login-modal {
        transition: none;
    }
    .login-modal-panel {
        animation: none;
    }
}