/* ============================================
   TECH-ZRT AI - PLATEFORME DE CALCULS CONSTRUCTION
   Styles principaux
   ============================================ */

/* Variables CSS */
:root {
    --primary: #CC3333;
    --primary-dark: #991111;
    --secondary: #4A5F7A;
    --secondary-dark: #2C3E50;

    --gray-50: #FAFAFA;
    --gray-100: #F5F5F7;
    --gray-200: #E5E5E7;
    --gray-300: #D1D1D6;
    --gray-400: #9B9B9D;
    --gray-500: #6B6B6D;
    --gray-600: #48484A;
    --gray-700: #3A3A3C;
    --gray-800: #2C2C2E;
    --gray-900: #1C1C1E;

    --success: #4CAF50;
    --warning: #FF9800;
    --error: #F44336;
    --info: #2196F3;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

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

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    transition: all 0.2s ease;
}

/* HEADER */
.platform-header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.logo-text h1 {
    font-size: 1.875rem;
    font-weight: 900;
    color: var(--gray-900);
    line-height: 1;
    margin-bottom: 0.125rem;
}

.logo-text p {
    font-size: 1rem;
    color: var(--gray-500);
    line-height: 1;
}

.header-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--gray-600);
    transition: all 0.2s ease;
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.nav-link.active {
    background: var(--primary);
    color: white;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    background: var(--gray-100);
    transition: all 0.2s ease;
}

.btn-icon:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

/* HERO SECTION */
.hero-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: white;
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 300;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #ffffff;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

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

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

.btn-secondary {
    background: white;
    color: var(--gray-900);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

/* SECTIONS */
.consoles-section,
.calculators-section,
.features-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
}

/* CONSOLES GRID */
.consoles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.console-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
    border: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
}

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

.console-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 32px;
    margin-bottom: 1.5rem;
}

.console-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.console-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.console-badge {
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-700);
}

.console-description {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.console-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tag {
    padding: 0.25rem 0.5rem;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-700);
}

.btn-console {
    width: 100%;
    padding: 1rem;
    background: var(--gray-900);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-console:hover {
    background: var(--gray-800);
}

/* CATEGORIES GRID */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    border: 1px solid var(--gray-200);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 24px;
    margin-bottom: 1rem;
}

.category-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.category-count {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.category-list {
    list-style: none;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.category-list li {
    padding: 0.5rem 0;
    font-size: 0.875rem;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
}

.category-list li:last-child {
    border-bottom: none;
}

.btn-category {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
}

.btn-category:hover {
    background: var(--primary-dark);
}

/* FEATURES GRID */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    margin: 0 auto 1.5rem;
}

.feature-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* FOOTER */
.platform-footer {
    background: var(--gray-900);
    color: white;
    margin-top: 3rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-section p {
    font-size: 0.875rem;
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-section a {
    display: block;
    font-size: 0.875rem;
    color: var(--gray-400);
    margin-bottom: 0.5rem;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding: 1.5rem 2rem;
    text-align: center;
}

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

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

.console-card,
.category-card,
.feature-item {
    animation: fadeIn 0.5s ease-out;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
    }

    .header-nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

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

    .consoles-grid,
    .categories-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }
}

html {
    scroll-behavior: smooth;
}