/* ═══════════════════════════════════════════
   Yekreter — Global Stiller
   Tasarim: Acik renkler, keskin cizgiler,
   gradient yok, dayanikli/guvenli imaj
   ═══════════════════════════════════════════ */

:root {
    --color-primary: #2D5BFF;
    --color-primary-dark: #1A3FCC;
    --color-primary-light: #EEF2FF;
    --color-primary-border: #C7D2FE;
    --color-bg: #FAFBFC;
    --color-bg-alt: #F3F4F6;
    --color-surface: #FFFFFF;
    --color-border: #D1D5DB;
    --color-border-strong: #9CA3AF;
    --color-text: #111827;
    --color-text-secondary: #374151;
    --color-text-muted: #6B7280;
    --color-text-light: #9CA3AF;
    --color-danger: #DC2626;
    --color-danger-light: #FEF2F2;
    --color-success: #059669;
    --color-success-light: #ECFDF5;
    --color-warning: #D97706;
    --color-warning-light: #FFFBEB;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-stack);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: var(--color-primary); transition: color 0.15s; }
a:hover { color: var(--color-primary-dark); }

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

/* Utility */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Container */
.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Buttons — keskin, duz, guvenli */
.btn {
    display: inline-block;
    padding: 0.65rem 1.4rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s;
    border: 2px solid transparent;
    text-align: center;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #fff;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-border);
}
.btn-secondary:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}
.btn-danger:hover {
    background: #B91C1C;
    border-color: #B91C1C;
    color: #fff;
}

.btn-sm { padding: 0.4rem 0.9rem; font-size: 0.82rem; }
.btn-block { display: block; width: 100%; }

/* Form Elements — keskin hatlar */
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.01em;
}
.form-control {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-surface);
    outline: none;
    transition: border-color 0.15s;
}
.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(45,91,255,0.1);
}
.form-control::placeholder {
    color: var(--color-text-light);
}

/* Alerts — keskin, duz */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    border-left: 3px solid;
}
.alert-error {
    background: var(--color-danger-light);
    border-left-color: var(--color-danger);
    color: var(--color-danger);
}
.alert-success {
    background: var(--color-success-light);
    border-left-color: var(--color-success);
    color: var(--color-success);
}
.alert-info {
    background: var(--color-primary-light);
    border-left-color: var(--color-primary);
    color: var(--color-primary);
}