/* ====================================
   ORZION AI - PROFESSIONAL STYLESHEET
   Colors: Black, White, Gold, Gray
   ==================================== */

/* CSS Variables */
:root {
    /* Colors - Professional Black/White/Gold/Gray Palette */
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gold: #FFD700;
    --color-gold-dark: #B8860B;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;

    /* Gradients */
    --gradient-gold: linear-gradient(135deg, #FFD700 0%, #B8860B 100%);
    --gradient-black: linear-gradient(135deg, #000000 0%, #212529 100%);
    --gradient-gray: linear-gradient(135deg, #343a40 0%, #495057 100%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Borders */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;

    /* Layout */
    --container-max-width: 1200px;
    --navbar-height: 80px;
}

/* ====================================
   RESET & BASE STYLES
   ==================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.loaded {
    overflow-x: hidden;
}

/* ====================================
   TYPOGRAPHY
   ==================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 3rem; font-weight: var(--font-weight-black); }
h2 { font-size: 2.25rem; font-weight: var(--font-weight-extrabold); }
h3 { font-size: 1.875rem; font-weight: var(--font-weight-bold); }
h4 { font-size: 1.5rem; font-weight: var(--font-weight-semibold); }
h5 { font-size: 1.25rem; font-weight: var(--font-weight-medium); }
h6 { font-size: 1.125rem; font-weight: var(--font-weight-medium); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-700);
}

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

/* ====================================
   LAYOUT COMPONENTS
   ==================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-black);
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ====================================
   NAVIGATION
   ==================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-black);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-text {
    font-weight: var(--font-weight-black);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
    position: relative;
    padding: var(--spacing-sm) 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-black);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-gold);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-black);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ====================================
   BUTTONS
   ==================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius-lg);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    font-family: inherit;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--color-black);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--color-white);
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-300);
}

.btn-secondary:hover {
    border-color: var(--color-gold);
    color: var(--color-black);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ====================================
   HERO SECTION
   ==================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--navbar-height);
    background: var(--color-black);
    color: var(--color-white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 215, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 215, 0, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-black);
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.title-line {
    display: block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-3xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-black);
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ====================================
   FEATURES SECTION
   ==================================== */

.features {
    padding: var(--spacing-4xl) 0;
    background: var(--color-gray-100);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.feature-card {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--color-gray-200);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-lg);
    background: var(--gradient-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.feature-icon i {
    color: var(--color-black);
    font-size: 1.5rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

.feature-description {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ====================================
   MODELS PREVIEW SECTION
   ==================================== */

.models-preview {
    padding: var(--spacing-4xl) 0;
    background: var(--color-white);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.model-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

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

.model-card:hover::before {
    transform: scaleX(1);
}

.model-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.model-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.model-icon.pro {
    background: var(--gradient-gold);
    color: var(--color-black);
}

.model-icon.turbo {
    background: var(--gradient-gray);
}

.model-icon.mini {
    background: var(--color-gray-600);
}

.model-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-black);
    margin: 0;
}

.model-badge {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
}

.model-description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.model-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.model-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-700);
    font-size: 0.875rem;
}

.model-feature i {
    color: var(--color-gold);
    font-size: 1rem;
}

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

/* ====================================
   CTA SECTION
   ==================================== */

.cta {
    padding: var(--spacing-4xl) 0;
    background: var(--color-black);
    color: var(--color-white);
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-black);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.cta-description {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ====================================
   FOOTER
   ==================================== */

.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.footer-description {
    color: var(--color-gray-400);
    line-height: 1.7;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-700);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-copyright {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    background: var(--color-gray-800);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--color-gold);
    color: var(--color-black);
    transform: translateY(-2px);
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */

/* Large tablets and small laptops */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .features-grid,
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* Tablets */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--navbar-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-2xl);
        gap: var(--spacing-lg);
        transition: var(--transition-normal);
        border-top: 1px solid var(--color-gray-200);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

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

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

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

    .models-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .hero-title {
        font-size: 2.5rem;
    }

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

/* Small tablets and large phones */
@media (max-width: 640px) {
    .hero-title {
        font-size: 2.25rem;
        line-height: 1.2;
    }
    
    .section-title {
        font-size: 1.875rem;
        line-height: 1.2;
    }
    
    .btn {
        min-height: 48px; /* Touch-friendly */
        font-size: 1rem;
    }
    
    .feature-card,
    .model-card {
        padding: var(--spacing-lg);
    }
    
    .nav-link {
        font-size: 1.1rem;
        padding: var(--spacing-md) 0;
    }
}

/* Mobile phones */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.1;
        margin-bottom: var(--spacing-md);
    }

    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.4;
    }

    .section-subtitle {
        font-size: 1rem;
        line-height: 1.4;
    }

    .cta-description {
        font-size: 1rem;
        line-height: 1.4;
    }
    
    .btn {
        min-height: 52px; /* Larger for easier tapping */
        font-size: 1.1rem;
        font-weight: 500;
    }
    
    .feature-card,
    .model-card {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .brand-text {
        font-size: 1.25rem;
    }
    
    /* Improve touch targets */
    .nav-link {
        padding: var(--spacing-md) var(--spacing-sm);
        margin: var(--spacing-xs) 0;
        border-radius: var(--border-radius-md);
        transition: background-color var(--transition-fast);
    }
    
    .nav-link:hover,
    .nav-link:focus {
        background-color: rgba(255, 215, 0, 0.1);
    }
}

/* ====================================
   UTILITY CLASSES
   ==================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none; }
.visible { display: block; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

/* ====================================
   ANIMATIONS
   ==================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-down {
    animation: fadeInDown 0.6s ease-out;
}