/* ========================================
   simeng.ai - Pure HTML + CSS
   Modern Minimalist + Tech-Savvy Design
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Geist Mono', monospace;
    font-weight: 600;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 14px;
    font-family: 'Geist Mono', monospace;
}

.brand-name {
    font-size: 20px;
    font-weight: bold;
    font-family: 'Geist Mono', monospace;
    color: #1f2937;
}

.navbar-menu {
    display: none;
    align-items: center;
    gap: 2rem;
}

@media (min-width: 768px) {
    .navbar-menu {
        display: flex;
    }
}

.nav-link {
    color: #6b7280;
    text-decoration: none;
    transition: color 0.2s;
}

.nav-link:hover {
    color: #1f2937;
}

.navbar-mobile {
    display: flex;
}

@media (min-width: 768px) {
    .navbar-mobile {
        display: none;
    }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease-out;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-family: 'Inter', sans-serif;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 14px;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 18px;
}

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

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.btn-outline {
    border: 2px solid #9333ea;
    color: #9333ea;
    background: transparent;
}

.btn-outline:hover {
    background: #f3e8ff;
}

.btn-cta {
    background: white;
    color: #6366f1;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.btn-cta:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    padding-top: 8rem;
    padding-bottom: 5rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('https://d2xsxph8kpxj0f.cloudfront.net/97027634/EdLWPZjqxwkc46LuzPpzSf/hero-background-2DbDyXxLsUxa3Jz98PY3M5.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
}

.gradient-text {
    background: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.stat-value {
    font-size: 1.875rem;
    font-weight: bold;
    background: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: #6b7280;
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #6b7280;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: 5rem 0;
    background-color: #f9fafb;
}

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

.feature-card {
    padding: 1.5rem;
    border: 2px dashed #10b981;
    border-radius: 12px;
    background: white;
    transition: all 0.3s ease-out;
    cursor: pointer;
}

.feature-card:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    transform: scale(1.05);
}

.feature-image {
    width: 100%;
    height: 128px;
    border-radius: 8px;
    overflow: hidden;
    background: #f3f4f6;
    margin-bottom: 1rem;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feature-icon {
    width: 32px;
    height: 32px;
    color: #6366f1;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.feature-description {
    font-size: 0.875rem;
    color: #6b7280;
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing {
    padding: 5rem 0;
}

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

.pricing-card {
    padding: 2rem;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: white;
    transition: all 0.3s ease-out;
}

.pricing-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.pricing-card-featured {
    border: 2px solid #6366f1;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    transform: scale(1.05);
}

.pricing-badge {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    background: #e0e7ff;
    color: #6366f1;
    font-size: 0.75rem;
    font-weight: bold;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.pricing-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.pricing-description {
    font-size: 0.875rem;
    color: #6b7280;
    margin-bottom: 1.5rem;
}

.pricing-price {
    margin-bottom: 1.5rem;
}

.price-amount {
    font-size: 2.25rem;
    font-weight: bold;
    color: #1f2937;
}

.price-period {
    color: #6b7280;
    margin-left: 0.5rem;
}

.pricing-tokens {
    padding: 0.75rem;
    background: #f3f4f6;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.tokens-label {
    font-size: 0.875rem;
    color: #6b7280;
}

.tokens-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #6366f1;
}

.btn-block {
    margin-bottom: 1.5rem;
}

.pricing-features {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    font-size: 0.875rem;
    color: #6b7280;
}

.check-icon {
    color: #10b981;
    flex-shrink: 0;
}

/* ========================================
   Models Section
   ======================================== */
.models {
    padding: 5rem 0;
    background-color: #f9fafb;
}

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

.model-card {
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: white;
    transition: all 0.3s ease-out;
    cursor: pointer;
}

.model-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.model-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.model-name {
    font-size: 1.125rem;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.model-provider {
    font-size: 0.875rem;
    color: #6b7280;
}

.model-stats {
    text-align: right;
}

.stat-label {
    font-size: 0.75rem;
    color: #6b7280;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: bold;
    color: #6366f1;
}

.trend {
    font-size: 0.75rem;
    font-weight: bold;
    margin-top: 0.25rem;
}

.trend.positive {
    color: #10b981;
}

.models-cta {
    text-align: center;
    margin-top: 2rem;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    text-align: center;
}

.cta-title {
    font-size: 2.25rem;
    font-weight: bold;
    color: white;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: #111827;
    color: #9ca3af;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col {
    display: flex;
    flex-direction: column;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.logo-small {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 12px;
    font-family: 'Geist Mono', monospace;
}

.footer-description {
    font-size: 0.875rem;
    color: #9ca3af;
}

.footer-title {
    font-weight: 600;
    color: white;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.social-link:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    text-align: center;
    font-size: 0.875rem;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-legal {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

@media (min-width: 768px) {
    .footer-legal {
        justify-content: flex-end;
    }
}

.footer-legal a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-legal a:hover {
    color: white;
}

/* ========================================
   Icons
   ======================================== */
.icon {
    display: inline-block;
    vertical-align: middle;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 640px) {
    .hero-title {
        font-size: 1.875rem;
    }

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

    .section-title {
        font-size: 1.875rem;
    }

    .cta-title {
        font-size: 1.875rem;
    }

    .pricing-card-featured {
        transform: scale(1);
    }
}