/* ========================================
   GSMTekno - Main Stylesheet (Dark Theme)
   ======================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

/* --- CSS Variables --- */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1524;
    --bg-card: #111827;
    --bg-card-hover: #1a2332;
    --color-primary: #00d4ff;
    --color-secondary: #7c3aed;
    --gradient: linear-gradient(135deg, #00d4ff, #7c3aed);
    --gradient-hover: linear-gradient(135deg, #00bfe6, #6d28d9);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #1e293b;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;
    --glow-primary: 0 0 20px rgba(0,212,255,0.3);
    --glow-secondary: 0 0 20px rgba(124,58,237,0.3);
    --glass-bg: rgba(17,24,39,0.7);
    --glass-border: rgba(255,255,255,0.08);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: #33ddff; }
img { max-width: 100%; height: auto; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); font-weight: 700; line-height: 1.2; }
ul { list-style: none; }
input, button, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Utility Classes --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 100px 0; }
.section-title {
    text-align: center; margin-bottom: 60px;
}
.section-title h2 {
    font-size: 2.5rem; margin-bottom: 16px;
    background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-title p { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.text-gradient { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* --- Flash Messages --- */
.flash-message {
    position: fixed; top: 90px; right: 20px; z-index: 10000;
    padding: 16px 24px; border-radius: var(--radius);
    display: flex; align-items: center; gap: 12px;
    backdrop-filter: blur(20px); border: 1px solid var(--glass-border);
    animation: slideInRight 0.4s ease-out;
    max-width: 400px;
}
.flash-success { background: rgba(16,185,129,0.15); border-color: rgba(16,185,129,0.3); color: #6ee7b7; }
.flash-error { background: rgba(239,68,68,0.15); border-color: rgba(239,68,68,0.3); color: #fca5a5; }
.flash-warning { background: rgba(245,158,11,0.15); border-color: rgba(245,158,11,0.3); color: #fcd34d; }
.flash-info { background: rgba(59,130,246,0.15); border-color: rgba(59,130,246,0.3); color: #93c5fd; }
.flash-close { background: none; border: none; color: inherit; cursor: pointer; font-size: 1.3rem; padding: 0; line-height: 1; }

/* --- Navbar --- */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}
.navbar.scrolled {
    background: rgba(10,14,23,0.92); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.navbar-brand { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 800; }
.navbar-brand span { color: var(--color-primary); }
.navbar-logo { height: 36px; margin-right: 10px; vertical-align: middle; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; position: relative; }
.nav-links a:hover { color: var(--text-primary); }
.nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
    background: var(--gradient); transition: width 0.3s ease;
}
.nav-links a:hover::after { width: 100%; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; border-radius: var(--radius); font-weight: 600; border: none; cursor: pointer; transition: var(--transition); font-size: 0.95rem; }
.btn-primary { background: var(--gradient); color: #fff; }
.btn-primary:hover { background: var(--gradient-hover); transform: translateY(-2px); box-shadow: var(--glow-primary); color:#fff; }
.btn-outline { background: transparent; border: 1.5px solid var(--color-primary); color: var(--color-primary); }
.btn-outline:hover { background: rgba(0,212,255,0.1); transform: translateY(-2px); }
.btn-sm { padding: 7px 16px; font-size: 0.85rem; }
.btn-lg { padding: 14px 36px; font-size: 1.05rem; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-success { background: var(--color-success); color: #fff; }
.btn-warning { background: var(--color-warning); color: #111; }

/* Mobile menu toggle */
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

/* --- Hero Section --- */
.hero {
    min-height: 100vh; display: flex; align-items: center; position: relative; overflow: hidden;
    background: radial-gradient(ellipse at 20% 50%, rgba(0,212,255,0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 50%, rgba(124,58,237,0.08) 0%, transparent 50%),
                var(--bg-primary);
}
.hero::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(0,212,255,0.04) 0%, transparent 40%),
                radial-gradient(circle at 70% 60%, rgba(124,58,237,0.04) 0%, transparent 40%);
    animation: heroRotate 30s linear infinite;
}
@keyframes heroRotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: 3.5rem; font-weight: 800; margin-bottom: 20px; letter-spacing: -1px; }
.hero p { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-glow {
    position: absolute; width: 400px; height: 400px; border-radius: 50%;
    filter: blur(120px); opacity: 0.15; pointer-events: none;
}
.hero-glow-1 { top: 10%; left: 10%; background: var(--color-primary); }
.hero-glow-2 { bottom: 10%; right: 10%; background: var(--color-secondary); }

/* Floating particles */
.particles { position: absolute; width: 100%; height: 100%; top: 0; left: 0; pointer-events: none; overflow: hidden; }
.particle {
    position: absolute; width: 4px; height: 4px; background: var(--color-primary);
    border-radius: 50%; opacity: 0; animation: particleFloat 8s infinite;
}
.particle:nth-child(2n) { background: var(--color-secondary); animation-duration: 10s; }
.particle:nth-child(3n) { width: 3px; height: 3px; animation-duration: 12s; }
@keyframes particleFloat {
    0% { opacity: 0; transform: translateY(100vh) scale(0); }
    20% { opacity: 0.6; }
    80% { opacity: 0.3; }
    100% { opacity: 0; transform: translateY(-100vh) scale(1); }
}

/* --- Services Section --- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.service-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg); padding: 32px; transition: var(--transition);
    backdrop-filter: blur(10px); position: relative; overflow: hidden;
}
.service-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient); opacity: 0; transition: opacity 0.3s;
}
.service-card:hover { transform: translateY(-6px); border-color: rgba(0,212,255,0.2); box-shadow: var(--glow-primary); }
.service-card:hover::before { opacity: 1; }
.service-icon {
    width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(124,58,237,0.1));
    font-size: 1.4rem; color: var(--color-primary); margin-bottom: 20px;
}
.service-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.service-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; }
.service-price { font-size: 1.3rem; font-weight: 700; color: var(--color-primary); }
.service-price small { font-size: 0.75rem; color: var(--text-muted); font-weight: 400; }

/* --- How It Works --- */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.step-card { text-align: center; position: relative; }
.step-number {
    width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    background: var(--gradient); font-family: var(--font-heading); font-size: 1.5rem; font-weight: 800;
    margin: 0 auto 24px; color: #fff;
}
.step-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.step-card p { color: var(--text-secondary); font-size: 0.9rem; }
.step-connector {
    position: absolute; top: 32px; left: calc(50% + 40px); width: calc(100% - 80px);
    height: 2px; background: var(--border-color);
}
.step-card:last-child .step-connector { display: none; }

/* --- Stats Section --- */
.stats-section { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-card { text-align: center; padding: 40px 20px; }
.stat-number {
    font-family: var(--font-heading); font-size: 3rem; font-weight: 800;
    background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    margin-bottom: 8px;
}
.stat-label { color: var(--text-secondary); font-size: 0.95rem; }

/* --- FAQ Section --- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); overflow: hidden; transition: var(--transition);
}
.faq-item.active { border-color: rgba(0,212,255,0.3); }
.faq-question {
    padding: 20px 24px; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
    font-weight: 600; font-size: 1rem; transition: var(--transition);
}
.faq-question:hover { color: var(--color-primary); }
.faq-question i { transition: transform 0.3s; color: var(--color-primary); }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* --- Contact Section --- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon {
    width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(124,58,237,0.1));
    color: var(--color-primary); font-size: 1.1rem; flex-shrink: 0;
}
.contact-item h4 { font-size: 1rem; margin-bottom: 4px; }
.contact-item p { color: var(--text-secondary); font-size: 0.9rem; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); }
.form-control {
    padding: 12px 16px; border-radius: var(--radius); border: 1px solid var(--border-color);
    background: var(--bg-card); color: var(--text-primary); transition: var(--transition);
    outline: none;
}
.form-control:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(0,212,255,0.1); }
.form-control::placeholder { color: var(--text-muted); }
textarea.form-control { min-height: 120px; resize: vertical; }

/* --- Footer --- */
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 60px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand p { color: var(--text-secondary); margin-top: 12px; font-size: 0.9rem; }
.footer h4 { font-size: 0.95rem; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-links a:hover { color: var(--color-primary); transform: translateX(4px); display: inline-block; }
.footer-social { display: flex; gap: 12px; margin-top: 8px; }
.footer-social a {
    width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
    background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-secondary);
    transition: var(--transition);
}
.footer-social a:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-3px); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 24px; text-align: center; color: var(--text-muted); font-size: 0.85rem; }

/* --- WhatsApp Float --- */
.whatsapp-float {
    position: fixed; bottom: 24px; right: 24px; z-index: 999;
    width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    background: #25d366; color: #fff; font-size: 1.6rem; box-shadow: 0 4px 20px rgba(37,211,102,0.4);
    transition: var(--transition); animation: pulse 2s infinite;
}
.whatsapp-float:hover { transform: scale(1.1); color: #fff; }
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(37,211,102,0.4); }
    50% { box-shadow: 0 0 0 12px rgba(37,211,102,0); }
}

/* --- Scroll Animations --- */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-left { opacity: 0; transform: translateX(-30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in-left.visible { opacity: 1; transform: translateX(0); }

/* --- Badges --- */
.badge { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: rgba(16,185,129,0.15); color: #6ee7b7; }
.badge-warning { background: rgba(245,158,11,0.15); color: #fcd34d; }
.badge-danger { background: rgba(239,68,68,0.15); color: #fca5a5; }
.badge-info { background: rgba(59,130,246,0.15); color: #93c5fd; }
.badge-secondary { background: rgba(148,163,184,0.15); color: #cbd5e1; }
.badge-primary { background: rgba(0,212,255,0.15); color: var(--color-primary); }

/* --- Keyframes --- */
@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .hero h1 { font-size: 2.5rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .steps-grid { grid-template-columns: 1fr; gap: 24px; }
    .step-connector { display: none; }
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .section-title h2 { font-size: 2rem; }
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }
    .nav-links { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(10,14,23,0.98); flex-direction: column; justify-content: center; align-items: center; gap: 24px; z-index: 999; }
    .nav-links.active { display: flex; }
    .nav-links a { font-size: 1.2rem; }
    .nav-toggle { display: block; z-index: 1001; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .stat-number { font-size: 2rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
}

/* --- Auth Pages --- */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 40px 20px;
    background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,0.05) 0%, transparent 50%), var(--bg-primary);
}
.auth-card {
    width: 100%; max-width: 440px; background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg); padding: 40px; backdrop-filter: blur(20px);
}
.auth-card h1 { text-align: center; font-size: 1.8rem; margin-bottom: 8px; }
.auth-card .subtitle { text-align: center; color: var(--text-secondary); margin-bottom: 32px; }
.auth-card .form-group { margin-bottom: 20px; }
.auth-card .btn { width: 100%; justify-content: center; padding: 14px; font-size: 1rem; }
.auth-footer { text-align: center; margin-top: 24px; color: var(--text-secondary); font-size: 0.9rem; }
.auth-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; padding: 12px 16px; border-radius: var(--radius); margin-bottom: 20px; font-size: 0.9rem; }