/**
 * Erden Yapı - Design Tokens & CSS Variables
 * Apple/Linear seviyesinde modern, modüler ve kurumsal mimari tokens
 */

:root {
    /* Renk Paleti - Ana Kurumsal (Derin Gece Mavisi) */
    --color-primary: #0c1a2c;
    --color-primary-light: #162a45;
    --color-primary-dark: #07101c;
    --color-primary-rgb: 12, 26, 44;

    /* İnşaat Amber / Altın Vurgusu */
    --color-accent: #d97706;
    --color-accent-hover: #b45309;
    --color-accent-light: #fef3c7;
    --color-accent-rgb: 217, 119, 6;

    /* İletişim & Dönüşüm Renkleri */
    --color-whatsapp: #25D366;
    --color-whatsapp-hover: #1ebd5a;
    --color-phone: #0284c7;
    --color-phone-hover: #0369a1;

    /* Yüzey & Zemin Renkleri */
    --color-surface: #ffffff;
    --color-surface-subtle: #f8fafc;
    --color-surface-muted: #f1f5f9;
    --color-surface-elevated: #ffffff;

    /* Kenarlıklar */
    --color-border: #e2e8f0;
    --color-border-subtle: #edf2f7;
    --color-border-dark: rgba(255, 255, 255, 0.12);

    /* Tipografi Renkleri */
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-text-light: #94a3b8;
    --color-text-inverse: #ffffff;
    --color-text-inverse-muted: #94a3b8;

    /* Durum Bildirimleri */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    /* Tipografi Sistemi */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    --text-xs: 0.75rem;     /* 12px */
    --text-sm: 0.875rem;    /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg: 1.125rem;    /* 18px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: clamp(1.35rem, 2.2vw, 1.65rem); /* 22px - 26px */
    --text-3xl: clamp(1.65rem, 3vw, 2.15rem);   /* 26px - 34px */
    --text-4xl: clamp(2.1rem, 4vw, 2.85rem);    /* 34px - 45px */
    --text-5xl: clamp(2.5rem, 5vw, 3.75rem);    /* 40px - 60px */

    /* Satır Yükseklikleri */
    --leading-tight: 1.15;
    --leading-snug: 1.3;
    --leading-normal: 1.65;
    --leading-relaxed: 1.8;

    /* Spacing Sistemi (8-noktalı grid) */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    --space-16: 4rem;    /* 64px */
    --space-20: 5rem;    /* 80px */
    --space-24: 6rem;    /* 96px */

    /* Köşe Yuvarlama (Radius) */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Gölgeler (Elevation) */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 16px 32px -4px rgba(12, 26, 44, 0.12);

    /* Geçişler (Transitions) */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);

    /* Konteyner & Yapısal Boyutlar */
    --container-max: 1240px;
    --container-narrow: 860px;
    --container-padding: 1.5rem;
    --header-height: 84px;
    --header-topbar-height: 42px;
}