/* 
  Akıllı Teknoloji - Premium Industrial Design System
  FULL REWRITE - Dark, Glassmorphism, Gradient, Animated
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;600;700;800;900&display=swap');

/* ============================================
   DESIGN TOKENS
============================================ */
:root {
    --clr-dark: #050810;
    --clr-dark-2: #0A0E1A;
    --clr-dark-3: #111928;
    --clr-blue-deep: #0A2463;
    --clr-blue: #1B4FD8;
    --clr-blue-light: #3D7BFF;
    --clr-cyan: #00C2CB;
    --clr-silver: #A8B8D8;
    --clr-white: #FFFFFF;
    --clr-text: rgba(255, 255, 255, 0.85);
    --clr-muted: rgba(168, 184, 216, 0.7);

    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-hover: rgba(255, 255, 255, 0.1);

    --gradient-brand: linear-gradient(135deg, #1B4FD8, #00C2CB);
    --gradient-card: linear-gradient(145deg, rgba(27,79,216,0.15), rgba(0,194,203,0.05));
    --gradient-hero: linear-gradient(180deg, rgba(5,8,16,0.7) 0%, rgba(5,8,16,0.4) 50%, rgba(5,8,16,0.85) 100%);

    --shadow-glow: 0 0 40px rgba(27, 79, 216, 0.25);
    --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
    --shadow-hover: 0 20px 60px rgba(0,0,0,0.5);

    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;

    --header-height: 80px;
    --radius: 16px;
    --radius-sm: 8px;
}

/* ============================================
   RESET & BASE
============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--clr-dark);
    color: var(--clr-text);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    color: var(--clr-white);
    line-height: 1.15;
}

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

ul { list-style: none; }

img { max-width: 100%; }

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   SCROLLBAR
============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-dark-2); }
::-webkit-scrollbar-thumb { background: var(--clr-blue); border-radius: 3px; }

/* ============================================
   HEADER
============================================ */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    display: flex;
    align-items: center;
    background: transparent;
    transition: var(--transition);
}

header.scrolled {
    background: rgba(5, 8, 16, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}

.header-inner {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2;
}

.logo-area img { width: 42px; height: 42px; filter: brightness(0) invert(1); }

.logo-area span {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: 2px;
    color: var(--clr-white);
    text-transform: uppercase;
}

.logo-area span em {
    font-style: normal;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
nav ul {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.75);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--clr-white);
    background: var(--glass-hover);
}

/* Language Selector */
.lang-selector {
    position: relative;
    cursor: pointer;
    padding: 0.45rem 1rem;
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--clr-white);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.lang-selector:hover {
    border-color: var(--clr-blue-light);
    box-shadow: 0 0 15px rgba(61, 123, 255, 0.2);
}

.lang-selector::after {
    content: '▾';
    font-size: 0.7rem;
    opacity: 0.6;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--clr-dark-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0;
    min-width: 130px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.lang-selector:hover .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown a {
    display: block;
    padding: 0.55rem 1.2rem;
    font-size: 0.86rem;
    color: var(--clr-muted);
    transition: var(--transition-fast);
}

.lang-dropdown a:hover {
    background: var(--glass-hover);
    color: var(--clr-white);
    padding-left: 1.5rem;
}

/* ============================================
   HERO SECTION
============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero), url('../images/hero_bg.png') center/cover no-repeat;
    overflow: hidden;
}

/* Animated Grid Background Overlay */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to right, rgba(27,79,216,0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(27,79,216,0.08) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
    opacity: 0.6;
}

/* Glow orbs */
.hero::after {
    content: '';
    position: absolute;
    width: 800px;
    height: 800px;
    background: radial-gradient(ellipse, rgba(27,79,216,0.3) 0%, transparent 65%);
    top: -200px;
    right: -200px;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(60px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 820px;
    padding-top: var(--header-height);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(27,79,216,0.2);
    border: 1px solid rgba(61,123,255,0.35);
    border-radius: 50px;
    padding: 0.4rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--clr-cyan);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 2rem;
}

.hero-badge .dot {
    width: 7px; height: 7px;
    background: var(--clr-cyan);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.4); }
}

.hero h1 {
    font-size: clamp(2.6rem, 5.5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.08;
    margin-bottom: 1.75rem;
    color: var(--clr-white);
}

.hero h1 span {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--clr-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 0.9rem 2.2rem;
    background: var(--gradient-brand);
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 50px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.cta-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    opacity: 0;
    transition: var(--transition-fast);
}

.cta-button:hover::before { opacity: 1; }
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 15px 40px rgba(27,79,216,0.45); }

.cta-button-outline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 0.9rem 2.2rem;
    background: transparent;
    color: var(--clr-white);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.cta-button-outline:hover {
    background: var(--glass-hover);
    border-color: var(--clr-blue-light);
    transform: translateY(-3px);
}

/* Hero Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

.scroll-indicator .arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid rgba(255,255,255,0.3);
    border-bottom: 2px solid rgba(255,255,255,0.3);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   SECTION COMMON
============================================ */
.section {
    padding: 120px 0;
}

.section-dark {
    background: var(--clr-dark-2);
}

.section-darker {
    background: var(--clr-dark-3);
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-header .tag {
    display: inline-block;
    background: rgba(27,79,216,0.15);
    border: 1px solid rgba(27,79,216,0.35);
    color: var(--clr-blue-light);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 0.35rem 1rem;
    border-radius: 50px;
    margin-bottom: 1.2rem;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--clr-muted);
    max-width: 640px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ============================================
   SERVICE CARDS
============================================ */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 1.5rem;
}

.service-card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    transition: var(--transition);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    backdrop-filter: blur(10px);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover {
    border-color: rgba(27,79,216,0.4);
    background: var(--glass-hover);
    transform: translateY(-12px);
    box-shadow: var(--shadow-hover);
}

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

.service-card-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-brand);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--clr-white);
}

.service-card .card-desc {
    color: var(--clr-muted);
    font-size: 0.92rem;
    line-height: 1.7;
}

.service-card ul {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 0.25rem;
}

.service-card li {
    font-size: 0.9rem;
    color: var(--clr-silver);
    display: flex;
    align-items: center;
    gap: 10px;
}

.service-card li::before {
    content: '';
    display: block;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--clr-cyan);
    flex-shrink: 0;
}

.card-cta {
    margin-top: auto;
    padding-top: 1rem;
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--clr-blue-light);
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition-fast);
}

.card-cta::after {
    content: '→';
    transition: var(--transition-fast);
}

.card-cta:hover { color: var(--clr-cyan); }
.card-cta:hover::after { transform: translateX(5px); }

/* ============================================
   GLASS CARD (Projects section)
============================================ */
.glass-card {
    background: var(--gradient-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 3rem 2.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.glass-card::after {
    content: '';
    position: absolute;
    width: 250px; height: 250px;
    background: radial-gradient(circle, rgba(27,79,216,0.2) 0%, transparent 70%);
    bottom: -80px;
    right: -80px;
    pointer-events: none;
    transition: var(--transition);
}

.glass-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-hover); border-color: rgba(61,123,255,0.35); }
.glass-card:hover::after { transform: scale(1.3); }

.glass-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.glass-card p {
    color: var(--clr-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

/* ============================================
   STATS SECTION
============================================ */
.stats-section {
    background: linear-gradient(135deg, var(--clr-blue-deep) 0%, var(--clr-dark-2) 100%);
    border-top: 1px solid rgba(27,79,216,0.3);
    border-bottom: 1px solid rgba(27,79,216,0.3);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
    border-right: 1px solid rgba(255,255,255,0.07);
}

.stat-item:last-child { border-right: none; }

.stat-number {
    font-family: 'Outfit', sans-serif;
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.92rem;
    color: var(--clr-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   INDUSTRIES / WHY US BAND
============================================ */
.feature-strip {
    background: var(--clr-dark-3);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    padding: 60px 0;
}

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

.feature-strip-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.feature-strip-item .icon {
    font-size: 2rem;
    width: 64px; height: 64px;
    background: rgba(27,79,216,0.15);
    border: 1px solid rgba(27,79,216,0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-strip-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--clr-white);
}

.feature-strip-item p {
    font-size: 0.84rem;
    color: var(--clr-muted);
}

/* ============================================
   CTA BAND
============================================ */
.cta-band {
    background: linear-gradient(135deg, rgba(27,79,216,0.25), rgba(0,194,203,0.1));
    border: 1px solid rgba(27,79,216,0.3);
    border-radius: var(--radius);
    padding: 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin: 0 2rem;
}

.cta-band::before {
    content: '';
    position: absolute;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(27,79,216,0.2), transparent 65%);
    top: -150px; left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
}

.cta-band h2 { font-size: 2.5rem; margin-bottom: 1rem; }
.cta-band p { color: var(--clr-muted); margin-bottom: 2.5rem; font-size: 1.05rem; }

/* ============================================
   FOOTER
============================================ */
footer {
    background: var(--clr-dark-2);
    border-top: 1px solid var(--glass-border);
    padding: 80px 0 40px;
    color: var(--clr-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 60px;
}

.footer-brand .logo-area { margin-bottom: 1.5rem; }

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    max-width: 280px;
    color: var(--clr-muted);
}

footer h5 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--clr-white);
    margin-bottom: 1.5rem;
}

footer ul li { margin-bottom: 0.8rem; }

footer ul a {
    font-size: 0.9rem;
    color: var(--clr-muted);
    transition: var(--transition-fast);
}

footer ul a:hover { color: var(--clr-white); padding-left: 4px; }

.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ============================================
   ANIMATIONS
============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

.animate-up {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }