:root {
    /* Primary Colors - Electric Blue & Neon Orange */
    --primary-hue: 215;
    /* Electric Blue */
    --secondary-hue: 30;
    /* Neon Orange */

    --color-bg: #0b111a;
    /* Updated mesh gradient - Removing purples/pinks, using Deep Blues and Cyan/Orange glows */
    --color-bg-mesh: radial-gradient(at 0% 0%, hsla(215, 78%, 15%, 1) 0, transparent 55%),
        radial-gradient(at 90% 10%, hsla(200, 80%, 20%, 1) 0, transparent 50%),
        radial-gradient(at 50% 100%, hsla(215, 60%, 18%, 1) 0, transparent 50%);

    --color-text: #ffffff;
    --color-text-muted: #aab6c9;

    /* Using higher saturation for "Canlı" look */
    --color-primary: hsl(var(--primary-hue), 95%, 55%);
    --color-primary-dark: hsl(var(--primary-hue), 95%, 45%);
    --color-accent: hsl(var(--secondary-hue), 100%, 60%);

    --glass-bg: rgba(16, 29, 45, 0.6);
    --glass-border: rgba(66, 153, 225, 0.25);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);

    --font-main: 'Montserrat', sans-serif;

    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background-color: var(--color-bg);
    background-image: var(--color-bg-mesh);
    background-attachment: fixed;
    background-size: cover;
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Layout --- */

header {
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 10;
}

/* Add a subtle glow to header */

header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: radial-gradient(circle at center, rgba(66, 153, 225, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* --- Hero Section --- */
.hero-section {
    padding: 20px 0;
    text-align: center;
    position: relative;
    margin-bottom: 20px;
}

.logo-container img {
    height: 80px;
    filter: drop-shadow(0 0 25px rgba(66, 153, 225, 0.4));
    transition: transform 0.3s ease;
}

.logo-container img:hover {
    transform: scale(1.05) rotate(-2deg);
}

.content {
    flex: 1;
    padding: 0 20px 20px 20px;
    /* Removed top padding */
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    text-align: center;
}

/* --- Typography --- */

h1 {
    font-size: 3.2rem;
    font-weight: 900;
    margin-top: 0;
    /* Remove browser default top margin */
    margin-bottom: 0.5rem;
    /* Vibrant Gradient Text */
    background: linear-gradient(135deg, #fff 0%, var(--color-accent) 50%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.15;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 2rem;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

p {
    color: var(--color-text-muted);
    line-height: 1.6;
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 2rem auto;
}

.highlight {
    color: var(--color-accent);
    font-weight: 800;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 0.9rem;
    text-shadow: 0 0 10px rgba(255, 107, 0, 0.5);
}

.cta-tag {
    background: var(--color-accent);
    color: #000;
    padding: 0.6rem 1.8rem;
    border-radius: 50px;
    font-weight: 800;
    display: inline-block;
    margin-bottom: 2rem;
    box-shadow: 0 0 25px rgba(255, 165, 0, 0.6);
    animation: float 3s ease-in-out infinite;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

/* --- Buttons --- */

.button-group {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
    margin: 2rem 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 60px;
    padding: 0 40px;
    border-radius: var(--radius-md);
    font-size: 1.15rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    border: none;
    min-width: 280px;
    font-family: var(--font-main);
    z-index: 1;
}

.btn-primary {
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(33, 150, 243, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(33, 150, 243, 0.7);
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.15);
    color: white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* --- Cards (Footer & App Info) --- */

.app-promo {
    margin-top: 4rem;
    padding: 2.5rem;
    background: linear-gradient(160deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.9) 100%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    display: inline-block;
    max-width: 800px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.app-promo h2 {
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-top: 0;
}

.footer-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
    padding: 0 1rem;
}

.footer-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: left;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.footer-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
    box-shadow: 0 15px 40px rgba(66, 153, 225, 0.2);
}

.footer-card h2,
.footer-card h3 {
    margin-top: 0;
    color: var(--color-primary);
    /* Changed from accent to primary for better contrast */
    font-weight: 800;
}

.footer-card p {
    font-size: 1rem;
    margin: 0;
    max-width: none;
    color: #cbd5e1;
}

.footer-card.featured {
    border: 1px solid var(--color-accent);
    background: linear-gradient(145deg, rgba(255, 165, 0, 0.05) 0%, rgba(0, 0, 0, 0.2) 100%);
}

.footer-card.featured h3 {
    color: var(--color-accent);
}

footer {
    margin-top: auto;
    padding: 3rem 2rem;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
}

/* --- Mobile Responsiveness --- */

@media (max-width: 768px) {
    h1 {
        font-size: 2.4rem;
    }

    .subtitle {
        font-size: 1.25rem;
    }

    .content {
        padding: 15px;
    }

    .footer-cards {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
        min-width: unset;
    }
}