:root {
    /* Colors */
    --color-primary: #0f172a;
    --color-secondary: #e2e8f0;
    --color-accent: #243F8B;
    --color-accent-hover: #3558C4;
    --color-text-main: #0f172a;
    --color-text-muted: #64748b;
    --color-bg-dark: #f8fafc;
    --color-bg-light: #ffffff;
    --color-glass: rgba(255, 255, 255, 0.9);
    --color-glass-border: rgba(15, 23, 42, 0.08);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 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-color: var(--color-bg-dark);
    color: var(--color-text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/*
 * Tüm sayfada duran hafif arka plan dokusu.
 * Sabit konumlu bir katman: kaydırırken yerinde kalır, iOS Safari'de
 * background-attachment: fixed gibi tekleme yapmaz. z-index: -1 içeriğin
 * altında tutar, pointer-events: none tıklamaları engellemez.
 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-color: #f7f8fa;
    background-image:
        /* saten parlaklığı: geniş, yumuşak ışık süpürmeleri */
        radial-gradient(140% 60% at 12% 16%, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0) 55%),
        radial-gradient(120% 55% at 88% 74%, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0) 55%),
        /*
         * Akışkan diyagonal dalgalar. İki bandın açıları ve periyotları
         * birbirinin katı değil (270 / 390 px); üst üste binince desen
         * kendini tekrar ediyormuş gibi durmuyor, organik dalga veriyor.
         */
        repeating-linear-gradient(28deg, rgba(15, 23, 42, 0.014) 0, transparent 90px, transparent 180px, rgba(15, 23, 42, 0.014) 270px),
        repeating-linear-gradient(-34deg, rgba(15, 23, 42, 0.01) 0, transparent 130px, transparent 260px, rgba(15, 23, 42, 0.01) 390px),
        /* kumaşın ince kıvrım/fırça izleri — dalgalarla aynı yönde, çok silik */
        repeating-linear-gradient(28deg, rgba(15, 23, 42, 0.008) 0, transparent 9px, transparent 17px, rgba(15, 23, 42, 0.008) 26px);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-primary);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.flex {
    display: flex;
    gap: var(--spacing-sm);
}

.section-padding {
    padding: var(--spacing-xl) 0;
}

.text-accent {
    color: var(--color-accent);
}

.text-center {
    text-align: center;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -8px rgba(36, 63, 139, 0.45);
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    background: transparent;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
    .section-padding {
        padding: var(--spacing-lg) 0;
    }

    .container {
        width: 95%;
    }
}

@media (max-width: 480px) {
    .section-padding {
        padding: var(--spacing-md) 0;
    }
}