/* =============================================================================
   Renk sistemi — açık / koyu
   Marka: ink #0f172a · accent #3b82f6 · arka plan açık gri / inci tonu
   ============================================================================= */

:root {
    /* —— Marka çekirdeği —— */
    --color-primary: #0f172a;
    --color-secondary: #3b82f6;
    --color-secondary-deep: #2563eb;
    --color-secondary-deeper: #1d4ed8;
    --color-secondary-light: #60a5fa;
    --color-secondary-soft: #93c5fd;
    --color-accent-cyan: #38bdf8;

    /* —— Yüzeyler (açık tema: soğuk inci, hafif derinlik) —— */
    --color-bg: #e6eaf4;
    --color-bg-elevated: #eef1f9;
    --color-surface: #ffffff;
    --color-surface-2: #f6f7fd;
    --color-surface-muted: #ebeff8;

    /* —— Metin hiyerarşisi —— */
    --color-text: #0b1220;
    --color-text-secondary: #334155;
    --color-muted: #5c6b82;
    --color-muted-soft: #8a96ab;

    /* —— Kenarlık / ayırıcı —— */
    --color-border: color-mix(in srgb, var(--color-primary) 10%, transparent);
    --color-border-strong: color-mix(in srgb, var(--color-primary) 16%, transparent);
    --color-border-accent: color-mix(in srgb, var(--color-secondary) 32%, transparent);
    --color-border-accent-soft: color-mix(in srgb, var(--color-secondary) 18%, transparent);

    /* —— Vurgu alanları (chip, ikon zeminleri) —— */
    --accent-fill-subtle: color-mix(in srgb, var(--color-secondary) 12%, transparent);
    --accent-fill-muted: color-mix(in srgb, var(--color-secondary) 8%, transparent);
    --accent-ring: color-mix(in srgb, var(--color-secondary) 38%, transparent);
    --accent-glow: color-mix(in srgb, var(--color-secondary) 34%, transparent);

    /* —— Cam / cam kenar —— */
    --glass-bg: color-mix(in srgb, var(--color-surface) 78%, transparent);
    --glass-bg-strong: color-mix(in srgb, var(--color-surface) 88%, transparent);
    --glass-border: color-mix(in srgb, var(--color-surface) 55%, white 45%);
    --glass-highlight: color-mix(in srgb, white 70%, var(--color-secondary-soft) 30%);

    /* —— Gölgeler (renk sıcaklığı primary ile hizalı) —— */
    --shadow-color: color-mix(in srgb, var(--color-primary) 22%, transparent);
    --shadow-sm: 0 1px 2px var(--shadow-color), 0 1px 3px color-mix(in srgb, var(--color-primary) 8%, transparent);
    --shadow-md: 0 8px 24px color-mix(in srgb, var(--color-primary) 12%, transparent),
        0 20px 48px color-mix(in srgb, var(--color-primary) 8%, transparent);
    --shadow-lg: 0 16px 40px color-mix(in srgb, var(--color-primary) 14%, transparent),
        0 32px 72px color-mix(in srgb, var(--color-primary) 10%, transparent);
    --shadow-glow-accent: 0 12px 40px color-mix(in srgb, var(--color-secondary) 28%, transparent);

    /* —— Sayfa arka planı (sabit mesh) —— */
    --bg-mesh: radial-gradient(ellipse 120% 80% at 100% -20%, color-mix(in srgb, var(--color-secondary) 14%, transparent), transparent 55%),
        radial-gradient(ellipse 90% 60% at -10% 50%, color-mix(in srgb, var(--color-secondary-light) 10%, transparent), transparent 50%),
        linear-gradient(168deg, var(--color-bg-elevated) 0%, var(--color-bg) 42%, var(--color-surface-muted) 100%);

    /* —— Bölüm yıkama (hafif renk geçişleri) —— */
    --section-wash: linear-gradient(180deg, transparent 0%, color-mix(in srgb, var(--color-secondary) 5%, transparent) 48%, transparent 100%);

    /* —— Buton / marka gradyanları —— */
    --gradient-brand: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-deep) 42%, var(--color-secondary-deeper) 100%);
    --gradient-brand-hover: linear-gradient(135deg, var(--color-secondary-light) 0%, var(--color-secondary) 45%, var(--color-secondary-deep) 100%);
    --gradient-text-hero: linear-gradient(118deg, var(--color-secondary) 0%, var(--color-accent-cyan) 42%, var(--color-secondary-soft) 72%, #a5b4fc 100%);
    --gradient-logo: linear-gradient(145deg, var(--color-secondary-light) 0%, var(--color-secondary) 40%, var(--color-secondary-deep) 100%);

    /* —— Hero dekor (blob’lar) —— */
    --hero-blob-1: radial-gradient(ellipse 82% 62% at 18% 20%, color-mix(in srgb, var(--color-secondary) 30%, transparent), transparent 58%);
    --hero-blob-2: radial-gradient(ellipse 70% 52% at 88% 8%, color-mix(in srgb, var(--color-primary) 14%, transparent), transparent 52%);
    --hero-blob-3: radial-gradient(ellipse 55% 45% at 55% 85%, color-mix(in srgb, var(--color-secondary-light) 18%, transparent), transparent 55%);

    /* —— Semantik (form / bildirim) —— */
    --color-success: #16a34a;
    --color-success-soft: color-mix(in srgb, #16a34a 18%, transparent);
    --color-error: #dc2626;
    --color-error-soft: color-mix(in srgb, #dc2626 18%, transparent);
    --color-warning-bg: #fff7d6;
    --color-warning-text: #854d0e;

    --radius: 16px;
    --radius-sm: 12px;
    --nav-h: 72px;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* —— Koyu tema: daha derin lacivert tabaka, neon-eskisi yumuşak mavi parıltı —— */
html.dark {
    --color-bg: #050810;
    --color-bg-elevated: #0a0f1a;
    --color-surface: #0f1626;
    --color-surface-2: #131d32;
    --color-surface-muted: #0c121f;

    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-muted: #8b9cb3;
    --color-muted-soft: #647896;

    --color-border: color-mix(in srgb, #94a3b8 16%, transparent);
    --color-border-strong: color-mix(in srgb, #94a3b8 26%, transparent);
    --color-border-accent: color-mix(in srgb, var(--color-secondary-light) 38%, transparent);
    --color-border-accent-soft: color-mix(in srgb, var(--color-secondary) 22%, transparent);

    --accent-fill-subtle: color-mix(in srgb, var(--color-secondary) 18%, transparent);
    --accent-fill-muted: color-mix(in srgb, var(--color-secondary) 10%, transparent);
    --accent-ring: color-mix(in srgb, var(--color-secondary-light) 45%, transparent);
    --accent-glow: color-mix(in srgb, var(--color-secondary) 40%, transparent);

    --glass-bg: color-mix(in srgb, var(--color-surface) 82%, transparent);
    --glass-bg-strong: color-mix(in srgb, var(--color-surface-2) 90%, transparent);
    --glass-border: color-mix(in srgb, #94a3b8 18%, transparent);
    --glass-highlight: color-mix(in srgb, var(--color-secondary-light) 25%, transparent);

    --shadow-color: color-mix(in srgb, black 45%, transparent);
    --shadow-sm: 0 1px 2px var(--shadow-color), 0 2px 8px color-mix(in srgb, black 35%, transparent);
    --shadow-md: 0 12px 32px color-mix(in srgb, black 40%, transparent);
    --shadow-lg: 0 24px 56px color-mix(in srgb, black 50%, transparent);
    --shadow-glow-accent: 0 16px 48px color-mix(in srgb, var(--color-secondary) 32%, transparent);

    --bg-mesh: radial-gradient(ellipse 100% 70% at 100% 0%, color-mix(in srgb, var(--color-secondary) 22%, transparent), transparent 52%),
        radial-gradient(ellipse 80% 55% at 0% 40%, color-mix(in srgb, var(--color-primary) 35%, transparent), transparent 48%),
        linear-gradient(172deg, var(--color-bg-elevated) 0%, var(--color-bg) 45%, #03050a 100%);

    --section-wash: linear-gradient(180deg, transparent 0%, color-mix(in srgb, var(--color-secondary) 8%, transparent) 50%, transparent 100%);

    --gradient-text-hero: linear-gradient(118deg, var(--color-secondary-light) 0%, var(--color-accent-cyan) 38%, var(--color-secondary-soft) 70%, #c4b5fd 100%);

    --hero-blob-1: radial-gradient(ellipse 82% 62% at 22% 18%, color-mix(in srgb, var(--color-secondary) 34%, transparent), transparent 58%);
    --hero-blob-2: radial-gradient(ellipse 68% 50% at 85% 6%, color-mix(in srgb, #94a3b8 16%, transparent), transparent 52%);
    --hero-blob-3: radial-gradient(ellipse 50% 42% at 50% 92%, color-mix(in srgb, var(--color-secondary-deep) 22%, transparent), transparent 55%);

    --color-warning-bg: color-mix(in srgb, #fbbf24 16%, var(--color-surface));
    --color-warning-text: #fde68a;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--color-bg);
    background-image: var(--bg-mesh);
    background-attachment: fixed;
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
    color: var(--color-secondary-deep);
    text-decoration: underline;
}

:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px var(--accent-ring);
}

.site-main {
    padding-top: var(--nav-h);
}

.container {
    width: min(1120px, 92vw);
    margin-inline: auto;
}

.section {
    padding: clamp(4rem, 8vw, 6.5rem) 0;
}

.section__title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 0 0 0.5rem;
    color: var(--color-text);
    text-wrap: balance;
}

.section__lead {
    margin: 0 0 2.5rem;
    color: var(--color-muted);
    max-width: 52ch;
    font-size: 1.05rem;
}

/* --- İlk yükleme spinner --- */
.initial-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: grid;
    place-content: center;
    gap: 1rem;
    background: var(--color-bg);
    background-image: var(--bg-mesh);
    transition: opacity 0.35s var(--ease-out), visibility 0.35s;
}

.initial-loader--hide {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.initial-loader__spinner {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-secondary);
    border-right-color: color-mix(in srgb, var(--color-secondary-light) 55%, transparent);
    animation: spin 0.75s linear infinite;
    margin-inline: auto;
}

.initial-loader__text {
    font-size: 0.9rem;
    color: var(--color-muted);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* --- Form / validation --- */
.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-bottom: 1rem;
}

.form-field label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
}

.input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font: inherit;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.input:hover {
    border-color: var(--color-border-strong);
    background: var(--color-surface-2);
}

.input:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px var(--accent-ring);
    outline: none;
    background: var(--color-surface);
}

.textarea {
    min-height: 140px;
    resize: vertical;
}

.validation-message {
    color: var(--color-error);
    font-size: 0.8rem;
}

/* --- Blazor error UI --- */
#blazor-error-ui {
    background: var(--color-warning-bg);
    bottom: 0;
    box-shadow: var(--shadow-md);
    display: none;
    left: 0;
    padding: 0.75rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: var(--color-warning-text);
    border-top: 1px solid color-mix(in srgb, var(--color-warning-text) 25%, transparent);
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.65rem;
}

/* Hata sayfası (/Error) */
.text-danger {
    color: var(--color-error);
}