/* ========================================
   STELLA İSTASYON YAZILIM - GLOBAL STYLES
   ======================================== */

/* Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #00d4ff;
    --secondary: #0066ff;
    --accent: #00ff88;
    --dark: #0a0e27;
    --dark-light: #151932;
    --gray: #8892b0;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-blue: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    --transition: all 0.3s ease;
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--dark);
    color: var(--white);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--dark-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

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

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

nav.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 5px 30px rgba(0, 212, 255, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--white);
    text-decoration: none;
    z-index: 1002;
}

.logo img {
    height: 40px;
    margin-right: 1rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--gray);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    font-weight: 500;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    z-index: 1002;
    background: none;
    border: none;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--white);
    margin: 3px 0;
    transition: var(--transition);
}

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

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(rgba(10, 14, 39, 0.8), rgba(10, 14, 39, 0.9)), url('images/1.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    color: var(--gray);
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ========================================
   PAGE HEADER (Inner Pages)
   ======================================== */

.page-header {
    padding-top: 120px;
    padding-bottom: 60px;
    background: linear-gradient(rgba(10, 14, 39, 0.8), rgba(10, 14, 39, 0.9)), var(--dark-light);
    background-size: cover;
    background-position: center;
    text-align: center;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-header p {
    color: var(--gray);
    font-size: clamp(1rem, 2vw, 1.3rem);
}

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

.btn-primary,
.btn-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: var(--transition);
    text-align: center;
    min-width: 150px;
}

.btn-primary {
    background: var(--gradient-blue);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

/* ========================================
   SECTIONS
   ======================================== */

.content,
.features,
.gallery,
.stats {
    padding: 6rem 0;
}

.content {
    background: var(--dark);
}

.features {
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-light) 100%);
}

.gallery {
    background: var(--dark);
}

.stats {
    background: linear-gradient(135deg, var(--dark-light) 0%, var(--dark) 100%);
    padding: 4rem 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    color: var(--gray);
    font-size: clamp(1rem, 2vw, 1.2rem);
}

/* ========================================
   GRIDS & CARDS
   ======================================== */

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

.feature-card {
    background: rgba(21, 25, 50, 0.4);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 15px 35px rgba(0, 212, 255, 0.2);
}

.feature-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    margin-bottom: 1rem;
    color: var(--white);
}

.feature-description {
    color: var(--gray);
    line-height: 1.6;
}

/* Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    height: 250px;
    cursor: pointer;
    transition: var(--transition);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(10, 14, 39, 0.9), transparent);
    padding: 1.5rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-box {
    padding: 2rem;
    border-radius: 15px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: var(--transition);
}

.stat-box:hover {
    transform: translateY(-5px);
    background: rgba(0, 212, 255, 0.1);
}

.stat-box .number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--primary);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-box .label {
    color: var(--gray);
    font-size: 1rem;
}

/* ========================================
   FORMS
   ======================================== */

.contact-form-section {
    background: rgba(21, 25, 50, 0.6);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    color: var(--gray);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--white);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-button {
    width: 100%;
    padding: 1.2rem 2rem;
    background: var(--gradient-blue);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.form-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5);
}

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

footer {
    background: #000;
    padding: 3rem 0 1rem;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray);
}

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

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .vision-mission {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    /* Navigation Mobile */
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background: rgba(10, 14, 39, 0.98);
        width: 100%;
        height: 100vh;
        text-align: center;
        transition: 0.3s;
        padding-top: 100px;
        gap: 1.5rem;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.2rem;
        display: block;
        padding: 1rem;
    }
    
    /* Content Adjustments */
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        min-height: 100vh;
        padding: 2rem 0;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .page-header {
        padding-top: 100px;
        padding-bottom: 40px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    /* Grid Adjustments */
    .features-grid,
    .gallery-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .product-header {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .service-header {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .service-icon {
        margin: 0 auto 1rem;
    }
    
    .quick-links {
        grid-template-columns: 1fr;
    }
    
    /* Spacing Adjustments */
    .content,
    .features,
    .gallery {
        padding: 3rem 0;
    }
    
    .stats {
        padding: 2rem 0;
    }
    
    /* Footer Mobile */
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
    }
    
    .logo img {
        height: 30px;
    }
    
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        gap: 1rem;
    }
    
    .contact-form-section,
    .product-detail,
    .service-card {
        padding: 1.5rem;
    }
}

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

.fade-in {
    animation: fadeInUp 0.8s ease;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 3rem;
}

.mb-3 {
    margin-bottom: 3rem;
}

.hidden {
    display: none;
}

/* ========================================
   NOTIFICATIONS
   ======================================== */

.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    max-width: 350px;
    background: rgba(21, 25, 50, 0.95);
    border-radius: 10px;
    padding: 1rem 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 9999;
    animation: slideIn 0.3s ease;
}

.notification.success {
    border-left: 4px solid #00ff88;
}

.notification.error {
    border-left: 4px solid #ff4444;
}

.notification.info {
    border-left: 4px solid #00d4ff;
}

.notification-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.notification-close {
    background: none;
    border: none;
    color: #8892b0;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
}

.notification-close:hover {
    color: #ffffff;
}

.notification.fade-out {
    animation: slideOut 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(400px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(400px); opacity: 0; }
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.5);
}

/* ========================================
   TABLE WRAPPER
   ======================================== */

.table-wrapper {
    overflow-x: auto;
    margin: 1rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

/* ========================================
   PRELOADER
   ======================================== */

.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0a0e27;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.3);
    border-top-color: #00d4ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Page Specific Styles */

/* Kurumsal Page */
.about-section {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    margin-bottom: 5rem;
}

.vision-mission {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 5rem;
}

.vm-card {
    background: rgba(21, 25, 50, 0.6);
    padding: 3rem;
    border-radius: 20px;
    border-left: 4px solid var(--primary);
}

.vm-card:nth-child(2) {
    border-left-color: var(--accent);
}

/* Products Page */
.product-detail {
    background: rgba(21, 25, 50, 0.6);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 4rem;
    border-left: 5px solid var(--primary);
}

.product-header {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 3rem;
}

.product-icon-box {
    width: 200px;
    height: 200px;
    background: var(--gradient-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

/* Services Page */
.service-card {
    background: rgba(21, 25, 50, 0.6);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--gradient-blue);
}

.service-header {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 2rem;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.contact-info .info-item {
    background: rgba(21, 25, 50, 0.4);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

.contact-info .info-item:hover {
    transform: translateX(10px);
    background: rgba(21, 25, 50, 0.6);
}