:root {
    --bg-matte: #080b12;
    --bg-matte-card: rgba(15, 23, 42, 0.85);
    --cyan-neon: #00e5ff;
    --blue-electric: #0066ff;
    --purple-glow: #8b5cf6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-sub: #cbd5e1;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-hover: rgba(0, 229, 255, 0.4);
    --nav-height: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-matte);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
    transform: translateZ(0);
}

/* --- GPU OPTIMIZED LIQUID BACKGROUND --- */
.liquid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    filter: blur(40px);
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    animation: floatBlob 20s infinite ease-in-out alternate;
    opacity: 0.35;
    will-change: transform;
}

.blob-1 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, var(--cyan-neon) 0%, var(--blue-electric) 100%);
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--blue-electric) 0%, var(--purple-glow) 100%);
    bottom: -150px;
    right: -100px;
    animation-delay: -5s;
}

@keyframes floatBlob {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(80px, -50px, 0) scale(1.08); }
    100% { transform: translate3d(-50px, 60px, 0) scale(0.95); }
}

/* --- NAVBAR --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(8, 11, 18, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1250px;
    height: 100%;
    margin: 0 auto;
    padding: 0 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* --- NAV BRAND & LOGO (DÜZELTİLDİ) --- */
.nav-brand {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    height: 45px !important;
    max-height: 45px !important;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.4));
    transition: transform 0.3s ease;
}

.nav-brand:hover .nav-logo {
    transform: scale(1.05);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
    line-height: 1;
}

.brand-sub {
    font-size: 0.65rem;
    color: var(--cyan-neon);
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 3px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-sub);
    font-weight: 600;
    font-size: 0.92rem;
    transition: 0.3s;
}

.nav-links a:hover {
    color: var(--cyan-neon);
}

.nav-btn {
    padding: 10px 22px;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--cyan-neon), var(--blue-electric));
    color: #000 !important;
    font-weight: 700 !important;
}

.container {
    max-width: 1250px;
    margin: 0 auto;
    padding: 0 25px;
}

section {
    padding: 90px 0 20px 0;
}

/* --- REUSABLE GLASS CARD --- */
.glass-card {
    background: var(--bg-matte-card);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    transition: all 0.3s ease;
}

.glass-card:hover {
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
}

/* --- HERO SECTION --- */
.hero-section {
    padding-top: calc(var(--nav-height) + 50px);
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
}

.hero-title span {
    background: linear-gradient(135deg, var(--cyan-neon), var(--blue-electric));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--cyan-neon), var(--blue-electric));
    color: #000;
    font-weight: 700;
    text-decoration: none;
    transition: 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 229, 255, 0.3);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    font-weight: 700;
    text-decoration: none;
    transition: 0.3s;
}

.btn-secondary:hover {
    border-color: var(--cyan-neon);
    color: var(--cyan-neon);
}

/* --- 3D FLIP BUSINESS CARD --- */
.flip-card-container {
    perspective: 1000px;
    width: 100%;
    height: 390px;
    cursor: pointer;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

.flip-card-container:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 24px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(8, 11, 18, 0.95));
    border: 1px solid var(--cyan-neon);
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.15);
}

.card-back {
    transform: rotateY(180deg);
    border-color: rgba(0, 229, 255, 0.5);
}

.card-flip-hint {
    font-size: 0.72rem;
    color: var(--cyan-neon);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* --- KARTVİZİT ARKA YÜZ LİSTESİ --- */
.card-services-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
}

.card-service-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.card-service-item i {
    font-size: 1.2rem;
    color: var(--cyan-neon);
    margin-top: 2px;
    width: 20px;
}

.card-service-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

.card-service-item p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* --- SECTION HEADINGS --- */
.section-header {
    text-align: center;
    margin-bottom: 45px;
}

.section-tag {
    padding: 6px 16px;
    border-radius: 30px;
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid rgba(0, 229, 255, 0.2);
    color: var(--cyan-neon);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-top: 12px;
}

/* --- SERVICES GRID --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.service-card { padding: 30px; }

.service-icon {
    width: 55px;
    height: 55px;
    border-radius: 16px;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid var(--cyan-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--cyan-neon);
    margin-bottom: 20px;
}

.service-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.service-card p { color: var(--text-muted); font-size: 0.92rem; }

/* --- PROJECTS GRID --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
}

.project-card { padding: 30px; }

.project-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 14px;
    margin-bottom: 20px;
    border: 1px solid var(--glass-border);
}

/* --- FORM & INPUTS --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.form-control {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    color: #fff;
    margin-bottom: 15px;
    outline: none;
}

.form-control:focus { border-color: var(--cyan-neon); }

select.form-control {
    background: #0f172a;
    color: #fff;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--cyan-neon), var(--blue-electric));
    border: none;
    color: #000;
    font-weight: 700;
    cursor: pointer;
}

/* --- FLOATING TOAST NOTIFICATION --- */
.toast-container {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 9999;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--cyan-neon);
    padding: 16px 24px;
    border-radius: 14px;
    color: #fff;
    box-shadow: 0 10px 30px rgba(0, 229, 255, 0.2);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast i {
    color: #00ff88;
    font-size: 1.4rem;
}

/* --- FOOTER --- */
footer {
    padding: 35px 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    margin-top: 60px;
    color: var(--text-muted);
}

footer strong { color: var(--cyan-neon); }

@media (max-width: 992px) {
    .hero-grid, .contact-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
}

/* --- PROJE SİTEYE GİT BUTONU --- */
.btn-project-link {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 8px;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid var(--cyan-neon);
    color: var(--cyan-neon);
    font-size: 0.8rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-project-link:hover {
    background: var(--cyan-neon);
    color: #000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 229, 255, 0.3);
}