/* ========================================
   OPTUNE - Static Website Styles
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-bg-dark: #0a1628;
    --color-bg-darker: #061020;
    --color-bg-card: #0f1f35;
    --color-bg-card-hover: #142840;
    
    --color-primary: #14b8a6;
    --color-primary-light: #2dd4bf;
    --color-primary-dark: #0d9488;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);
    
    /* Gradients */
    --gradient-text: linear-gradient(135deg, #14b8a6 0%, #2dd4bf 50%, #14b8a6 100%);
    --gradient-bg: radial-gradient(ellipse at 50% 0%, rgba(20, 184, 166, 0.15) 0%, transparent 50%);
    --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 100px;
    --section-padding-mobile: 60px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-image {
    height: 36px;
    width: auto;
    object-fit: contain;
}

@media (max-width: 768px) {
    .logo-image {
        height: 28px;
    }
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-mobile {
    display: none;
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 16px;
    border-top: 1px solid var(--color-border);
}

.nav-mobile .btn {
    text-align: center;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg-dark);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(20, 184, 166, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    padding: 160px 0 80px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-bg);
    pointer-events: none;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(20, 184, 166, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 50%, rgba(20, 184, 166, 0.05) 0%, transparent 30%);
}

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

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(20, 184, 166, 0.1);
    border: 1px solid rgba(20, 184, 166, 0.3);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.badge svg {
    width: 16px;
    height: 16px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--color-text-primary);
}

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

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Stats */
.stats-container {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ========================================
   SECTIONS
   ======================================== */
.section-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    line-height: 1.7;
}

/* ========================================
   SERVICES SECTION
   ======================================== */
.services {
    padding: var(--section-padding) 0;
    background: var(--color-bg-darker);
    text-align: center;
}

.services .section-subtitle {
    margin: 0 auto 60px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    text-align: left;
}

.service-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-normal);
}

.service-card:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(20, 184, 166, 0.3);
    transform: translateY(-4px);
}

.service-icon {
    width: 48px;
    height: 48px;
    background: rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    padding: var(--section-padding) 0;
    text-align: center;
}

.about-intro {
    margin: 0 auto 16px;
}

.about .section-subtitle:last-of-type {
    margin: 0 auto 60px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.value-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

.value-card:hover {
    border-color: rgba(20, 184, 166, 0.3);
}

.value-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.value-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.vision-box {
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.1) 0%, rgba(20, 184, 166, 0.05) 100%);
    border: 1px solid rgba(20, 184, 166, 0.2);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.vision-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.vision-quote {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-primary-light);
    line-height: 1.6;
    margin-bottom: 24px;
    position: relative;
}

.vision-quote::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 4rem;
    color: rgba(20, 184, 166, 0.2);
    font-family: Georgia, serif;
}

.vision-text {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    padding: var(--section-padding) 0;
    background: var(--color-bg-darker);
    text-align: center;
}

.contact .section-subtitle {
    margin: 0 auto 60px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
    text-align: left;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.contact-value {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.contact-value:hover {
    color: var(--color-primary);
}

.contact-form-container {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.form-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    padding: 14px 16px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 8px;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    padding: 60px 0 24px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text-primary);
}

.footer-column a,
.footer-column span {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: 16px;
}

.footer-legal {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.footer-copy {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ========================================
   MODAL
   ======================================== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    overflow-y: auto;
    padding: 40px 24px;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.modal-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: 700px;
    width: 100%;
    padding: 40px;
    position: relative;
    animation: slideUp 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

.modal-content h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.modal-body h3 {
    font-size: 1.125rem;
    margin: 24px 0 12px;
    color: var(--color-primary);
}

.modal-body p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.modal-body ul {
    margin: 12px 0;
    padding-left: 24px;
}

.modal-body li {
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    list-style: disc;
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-info {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 40px;
    }
    
    .contact-item {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-mobile.active {
        display: flex;
    }
    
    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-lg {
        width: 100%;
        max-width: 280px;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .services,
    .about,
    .contact {
        padding: var(--section-padding-mobile) 0;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .vision-box {
        padding: 32px 24px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-form-container {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-info {
        flex-direction: column;
    }
}