/* ===========================================
   LANDING PAGE STYLES - Mendelbot
   =========================================== */

/* ===========================================
   Base Styles
   =========================================== */

html {
    scroll-behavior: smooth;
}

body {
    background: var(--background);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    z-index: 1000;
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: var(--space-4);
}

/* ===========================================
   Sticky Navigation
   =========================================== */

.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.landing-nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .landing-nav.scrolled {
    background: rgba(26, 26, 26, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

/* Brand */
.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--text);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--brand-primary-500), var(--brand-primary-600));
    color: white;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: var(--space-2);
    background: transparent;
    border: none;
    cursor: pointer;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-link {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    transition: color var(--transition-base);
    padding: var(--space-2) 0;
}

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

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.lang-btn {
    text-decoration: none;
    font-size: 1.25rem;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    opacity: 0.5;
    filter: grayscale(50%);
    line-height: 1;
}

.lang-btn:hover {
    opacity: 0.8;
    filter: grayscale(0%);
    transform: scale(1.1);
}

.lang-btn.active {
    opacity: 1;
    filter: grayscale(0%);
}

.lang-divider {
    display: none;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--surface-elevated);
    color: var(--primary);
    border-color: var(--primary);
}

.icon-sun,
.icon-moon {
    display: none;
}

[data-theme="light"] .icon-sun {
    display: block;
}

[data-theme="dark"] .icon-moon {
    display: block;
}

/* Nav CTA Button */
.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--brand-primary-500), var(--brand-primary-600));
    color: white;
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.nav-cta-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    box-shadow: none;
}

.nav-cta-outline:hover {
    background: var(--primary);
    color: white;
}

/* ===========================================
   Hero Section
   =========================================== */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--space-16)) var(--space-6) var(--space-16);
    background: linear-gradient(180deg, var(--surface) 0%, var(--background) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.hero-headline {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, var(--text) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subheadline {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-8);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Hero Login Form */
.hero-form {
    display: flex;
    justify-content: flex-end;
}

.login-card {
    width: 100%;
    max-width: 380px;
    padding: var(--space-8);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.login-card header {
    margin-bottom: var(--space-6);
    padding-bottom: 0;
    border-bottom: none;
}

.login-card header h2 {
    font-size: var(--font-size-xl);
    margin-bottom: 0;
}

.login-card form {
    margin: 0;
}

.login-card label {
    display: block;
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-muted);
}

.login-card input {
    width: 100%;
    margin-top: var(--space-2);
}

.login-card footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border);
    text-align: center;
}

.login-card footer a {
    color: var(--primary);
    text-decoration: none;
}

.login-card footer a:hover {
    text-decoration: underline;
}

/* ===========================================
   Buttons
   =========================================== */

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    background: linear-gradient(135deg, var(--brand-primary-500), var(--brand-primary-600));
    color: white;
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    background: transparent;
    color: var(--text);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: var(--surface-elevated);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    background: transparent;
    color: var(--primary);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    border: 2px solid var(--primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.btn-full {
    width: 100%;
}

/* ===========================================
   Section Styles
   =========================================== */

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-20) var(--space-6);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    text-align: center;
    margin-bottom: var(--space-12);
}

/* ===========================================
   Features Section
   =========================================== */

.features-section {
    background: var(--surface-elevated);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.feature-card {
    padding: var(--space-8);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--brand-primary-50), var(--brand-primary-100));
    border-radius: var(--radius-lg);
    color: var(--brand-primary-600);
    margin-bottom: var(--space-4);
}

[data-theme="dark"] .feature-icon {
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.1), rgba(20, 184, 166, 0.2));
    color: var(--brand-primary-400);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-3);
    text-transform: none;
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

/* ===========================================
   Pricing Section
   =========================================== */

.pricing-section {
    background: var(--background);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    align-items: stretch;
}

.pricing-card {
    position: relative;
    padding: var(--space-8);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card-popular {
    border: 2px solid var(--brand-primary-500);
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-4);
    background: linear-gradient(135deg, var(--brand-primary-500), var(--brand-primary-600));
    color: white;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--letter-spacing-wide);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.pricing-card header {
    text-align: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border);
}

.pricing-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-4);
    text-transform: none;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-1);
}

.price-currency {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-muted);
}

.price-amount {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--text);
    line-height: 1;
}

.price-contact {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
}

.price-period {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-6) 0;
    flex: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.check-icon {
    flex-shrink: 0;
    color: var(--brand-primary-500);
}

.pricing-card footer {
    padding-top: 0;
    border-top: none;
    margin-top: auto;
}

.pricing-card footer a {
    width: 100%;
}

/* ===========================================
   Footer
   =========================================== */

.landing-footer {
    margin-top: auto;
    padding: var(--space-8) var(--space-6);
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin: 0;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-divider {
    color: var(--border);
}

/* ===========================================
   Animations
   =========================================== */

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

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation delays for grid items */
.features-grid .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.features-grid .animate-on-scroll:nth-child(2) { transition-delay: 100ms; }
.features-grid .animate-on-scroll:nth-child(3) { transition-delay: 200ms; }
.features-grid .animate-on-scroll:nth-child(4) { transition-delay: 300ms; }

.pricing-grid .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.pricing-grid .animate-on-scroll:nth-child(2) { transition-delay: 100ms; }
.pricing-grid .animate-on-scroll:nth-child(3) { transition-delay: 200ms; }
.pricing-grid .animate-on-scroll:nth-child(4) { transition-delay: 300ms; }

/* ===========================================
   Responsive Styles
   =========================================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-10);
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

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

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

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        padding: var(--space-4) var(--space-6);
        gap: var(--space-2);
        box-shadow: var(--shadow-lg);
        display: none;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-link {
        padding: var(--space-3) 0;
    }

    .nav-actions {
        gap: var(--space-2);
    }

    .lang-toggle {
        display: none;
    }

    .nav-menu.open + .nav-actions .lang-toggle {
        display: flex;
    }

    .hero-section {
        min-height: auto;
        padding: calc(80px + var(--space-10)) var(--space-4) var(--space-10);
    }

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

    .login-card {
        padding: var(--space-6);
    }

    .section-container {
        padding: var(--space-12) var(--space-4);
    }

    .features-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
        gap: var(--space-4);
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .brand-text {
        display: none;
    }

    .nav-cta {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-xs);
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions a {
        width: 100%;
    }
}

/* ===========================================
   Beta Card (centered single card)
   =========================================== */

.beta-card-wrapper {
    display: flex;
    justify-content: center;
}

.beta-card-wrapper .pricing-card {
    max-width: 420px;
    width: 100%;
}

/* ===========================================
   Reduced Motion
   =========================================== */

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .feature-card:hover,
    .pricing-card:hover {
        transform: none;
    }
}