@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* ULTRA PREMIUM MIDNIGHT SAPPHIRE PALETTE */
    --bg-base: #030712;
    --bg-surface: #0f172a;
    --bg-surface-hover: #1e293b;
    --bg-input: rgba(2, 6, 23, 0.5);

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-strong: rgba(255, 255, 255, 0.12);
    --border-glow: rgba(56, 189, 248, 0.3);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --brand-primary: #3b82f6;
    --brand-accent: #0ea5e9;
    --brand-gradient: linear-gradient(135deg, #3b82f6, #0ea5e9);

    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;

    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(56, 189, 248, 0.15);
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
    --border-glass: rgba(255, 255, 255, 0.08);
    --bg-glass: rgba(15, 23, 42, 0.6);
    --blur-intensity: blur(12px);
    
    /* 🔹 KESKİN KÖŞELER (border-radius düşürüldü) */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;
}

* { box-sizing: border-box; }
body { margin: 0; padding: 0; font-family: 'Inter', -apple-system, sans-serif; background-color: var(--bg-base); color: var(--text-primary); overflow: hidden; -webkit-font-smoothing: antialiased; letter-spacing: -0.01em; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* --- CAM PANEL STILI (tutarlı) --- */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: var(--blur-intensity);
    -webkit-backdrop-filter: var(--blur-intensity);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
}

/* --- GİRİŞ EKRANI --- */
#auth-screen { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; display: flex; z-index: 9999; background: var(--bg-base); }
.auth-left { flex: 1.2; display: flex; flex-direction: column; justify-content: center; padding: 6%; background: radial-gradient(circle at 0% 0%, rgba(59, 130, 246, 0.1) 0%, transparent 50%), var(--bg-surface); border-right: 1px solid var(--border-subtle); position: relative; overflow: hidden; }
.auth-right { flex: 1; display: flex; justify-content: center; align-items: center; background: radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.05) 0%, transparent 50%), var(--bg-base); }

.auth-brand h1 { font-size: 38px; font-weight: 800; margin: 0 0 12px 0; color: var(--text-primary); letter-spacing: -1px; }
.auth-logo-img { height: 75px; object-fit: contain; margin-bottom: 24px; filter: drop-shadow(0 4px 10px rgba(0,0,0,0.3)); }

.auth-features { margin-top: 40px; display: flex; flex-direction: column; gap: 20px; }
.feature-item { display: flex; align-items: center; gap: 16px; font-size: 15px; color: var(--text-secondary); font-weight: 500; }
.feature-icon { width: 40px; height: 40px; background: var(--bg-input); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: var(--shadow-soft); color: var(--brand-accent); }

.auth-form-container { width: 100%; max-width: 400px; background: rgba(15, 23, 42, 0.7); backdrop-filter: blur(20px); border: 1px solid var(--border-strong); border-radius: var(--radius-lg); padding: 40px; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255,255,255,0.1); }

.auth-tabs { display: flex; gap: 6px; margin-bottom: 30px; background: rgba(0,0,0,0.3); padding: 6px; border-radius: var(--radius-md); border: 1px solid var(--border-subtle); }
.auth-tab { flex: 1; background: transparent; border: none; color: var(--text-muted); font-weight: 600; cursor: pointer; padding: 10px; border-radius: var(--radius-sm); transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); font-size: 13px; }
.auth-tab:hover { color: var(--text-primary); }
.auth-tab.active { background: var(--bg-surface-hover); color: var(--text-primary); box-shadow: 0 2px 8px rgba(0,0,0,0.2); border: 1px solid var(--border-subtle); }

.auth-form-content { display: none; animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
.auth-form-content.active { display: block; }
@keyframes slideUpFade { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }

.auth-form-content h2 { margin: 0 0 8px 0; font-size: 24px; font-weight: 700; letter-spacing: -0.5px; color: var(--text-primary); }
.auth-form-content p { color: var(--text-secondary); font-size: 13px; margin-bottom: 28px; line-height: 1.5; }

.input-group { margin-bottom: 18px; }
.input-group label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.input-group input, .input-group select { width: 100%; padding: 14px 16px; background: var(--bg-input); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); color: var(--text-primary); font-size: 14px; outline: none; transition: all 0.3s ease; font-family: inherit; box-shadow: inset 0 2px 4px rgba(0,0,0,0.2); appearance: none; }
.input-group input:focus, .input-group select:focus { border-color: var(--brand-primary); background: rgba(15, 23, 42, 0.8); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15), inset 0 2px 4px rgba(0,0,0,0.2); }
::-webkit-calendar-picker-indicator { filter: invert(0.8); cursor: pointer; }

.btn-primary-auth { width: 100%; padding: 14px; background: var(--brand-gradient); color: white; border: none; border-radius: var(--radius-md); font-weight: 600; font-size: 14px; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); margin-top: 10px; box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3); text-shadow: 0 1px 2px rgba(0,0,0,0.2); }
.btn-primary-auth:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4); filter: brightness(1.1); }
.btn-secondary-auth { width: 100%; padding: 14px; background: rgba(255,255,255,0.03); color: var(--text-primary); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); font-weight: 600; font-size: 14px; cursor: pointer; transition: all 0.3s ease; margin-top: 10px; }
.btn-secondary-auth:hover { background: rgba(255,255,255,0.08); border-color: var(--border-strong); transform: translateY(-1px); }