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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --gray-lighter: #e2e8f0;
    --white: #ffffff;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-text: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    --navbar-height: 64px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0;
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.3s ease, box-shadow 0.3s ease, height 0.3s ease;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.97);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    height: 56px;
}

.nav-content {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    width: 100%;
    padding: 0 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.2s;
    justify-self: start;
}

a.logo:hover {
    opacity: 0.85;
}

.logo svg {
    color: var(--primary);
    transition: transform 0.3s ease;
}

.logo:hover svg {
    transform: rotate(-5deg) scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    justify-self: center;
}

.nav-links a {
    color: var(--gray-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.2s;
    padding: 0.25rem 0;
}

.nav-links a:not(.btn-nav-demo)::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    border-radius: 1px;
    transition: width 0.3s ease;
}

.nav-links a:not(.btn-nav-demo):hover {
    color: var(--white);
}

.nav-links a:not(.btn-nav-demo):hover::after {
    width: 100%;
}

/* Nav Right (lang switcher + mobile toggle) */
.nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-self: end;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 0.25rem;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.2rem;
    border-radius: 8px;
}

.lang-switcher button {
    background: none;
    border: none;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
}

.lang-switcher button:hover {
    opacity: 0.8;
    background: rgba(255, 255, 255, 0.06);
}

.lang-switcher button.active {
    background: rgba(255, 255, 255, 0.1);
    opacity: 1;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.lang-switcher button svg {
    display: block;
    border-radius: 2px;
}

.btn-nav-demo {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.25rem !important;
    background: var(--gradient);
    color: var(--white) !important;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-nav-demo:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s ease;
}

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

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1.4;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-large {
    padding: 1rem 2.25rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    padding-top: calc(var(--navbar-height) + 4rem);
    background: var(--dark);
    color: var(--white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.08;
    z-index: 0;
}

.grid-pattern {
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.15) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.15) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

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

.hero-description {
    font-size: 1.2rem;
    color: var(--gray-light);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--gray-light);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* ===== SECTIONS ===== */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--dark);
}

.section-description {
    font-size: 1.2rem;
    color: var(--gray);
    line-height: 1.8;
}

/* What is Section */
.what-is {
    background: var(--white);
}

.what-is-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.what-is-card {
    padding: 2.5rem 2rem;
    background: var(--white);
    border: 1px solid var(--gray-lighter);
    border-radius: 1rem;
    transition: all 0.3s;
}

.what-is-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--primary);
}

.what-is-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.what-is-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.what-is-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* Features Section */
.features {
    background: #f8fafc;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    padding: 2rem;
    background: var(--white);
    border-radius: 1rem;
    border: 1px solid var(--gray-lighter);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
    border-color: var(--primary);
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: 0.75rem;
    color: var(--white);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--dark);
}

.feature-card p {
    color: var(--gray);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Screenshots Section */
.screenshots {
    background: var(--white);
}

.screenshots-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.screenshot-card {
    background: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--gray-lighter);
    transition: all 0.3s;
}

.screenshot-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
}

.screenshot-placeholder {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-content {
    text-align: center;
    color: var(--white);
}

.placeholder-content svg {
    margin-bottom: 1rem;
    opacity: 0.8;
}

.placeholder-content p {
    font-weight: 600;
}

.screenshot-card h3 {
    padding: 1.5rem;
    font-size: 1.25rem;
    color: var(--dark);
}

.screenshot-card p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray);
}

/* ===== CONTACT SECTION ===== */
.contact {
    background: var(--dark);
    color: var(--white);
}

.contact .section-title,
.contact .section-description {
    color: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    background: var(--dark-light);
    padding: 2.5rem;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--gray-light);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    color: var(--white);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    color: var(--gray-light);
    font-weight: normal;
    font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
    cursor: pointer;
    accent-color: var(--primary);
}

.checkbox-label span {
    user-select: none;
}

/* Form message */
.form-message {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    text-align: center;
}

.form-message.success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-card {
    background: var(--dark-light);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: border-color 0.2s;
}

.info-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.info-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.info-card h3 {
    margin-bottom: 0.5rem;
    color: var(--white);
}

.info-card p {
    color: var(--gray-light);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark);
    color: var(--gray-light);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--gray-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-disclaimer {
    margin-top: 3rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 0.5rem;
    text-align: center;
}

.footer-disclaimer p {
    color: var(--gray-light);
    font-size: 0.8rem;
    line-height: 1.6;
    max-width: 900px;
    margin: 0 auto;
}

.footer-disclaimer strong {
    color: var(--white);
    font-weight: 600;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 0.85rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        justify-self: auto;
        width: 280px;
        height: 100vh;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        gap: 1.5rem;
        transition: right 0.3s ease;
        z-index: 999;
        border-left: 1px solid rgba(255, 255, 255, 0.06);
    }

    .nav-links.open {
        right: 0;
    }

    .nav-links a {
        font-size: 1.1rem;
    }

    .btn-nav-demo {
        width: 100%;
        justify-content: center;
    }

    .hero {
        padding-top: calc(var(--navbar-height) + 2rem);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-disclaimer p {
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    section {
        padding: 4rem 0;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}