:root {
    --primary: #c19e5d;
    --primary-light: #fef9eb;
    --accent: #2d3436;
    --bg-main: #f0f2f5;
    --sidebar-bg: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-main: #2d3436;
    --text-muted: #718096;
    --border-color: #edf2f7;
    --success: #2ecc71;
    --warning: #f1c40f;
    --danger: #e74c3c;
    --radius-lg: 24px;
    --radius-md: 16px;
    --shadow-soft: 0 4px 20px rgba(0,0,0,0.04);
    --shadow-premium: 0 20px 40px rgba(0,0,0,0.06);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, sans-serif;
    height: 100vh;
    overflow: hidden;
}

/* --- GİRİŞ EKRANI (RESERVED CENTERED) --- */
#app { height: 100%; width: 100%; display: flex; align-items: center; justify-content: center; }

#login-screen {
    background: var(--card-bg);
    padding: 60px 50px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-premium);
    width: 440px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.8);
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: fadeInScale 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

#login-screen h1 { font-size: 2.4rem; font-weight: 900; margin-bottom: 40px; color: var(--accent); letter-spacing: -1.5px; }

.login-box { width: 100%; margin-bottom: 35px; }
#user-code-input {
    width: 100%; padding: 20px; background: #f8f9fa; border: 2px solid #edf2f7; border-radius: var(--radius-md);
    color: var(--text-main); text-align: center; font-size: 1.3rem; font-weight: 700; margin-bottom: 25px; outline: none; transition: all 0.3s;
}
#user-code-input:focus { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 5px rgba(193, 158, 93, 0.15); }

#pin-display { display: flex; justify-content: center; gap: 14px; }
.dot { width: 16px; height: 16px; border: 2px solid #e2e8f0; border-radius: 50%; transition: all 0.2s; }
.dot.active { background: var(--primary); border-color: var(--primary); transform: scale(1.2); }

.pin-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; width: 100%; margin-top: 10px; }
.pin-btn {
    aspect-ratio: 1; border-radius: 22px; border: none; background: #f8f9fa; color: var(--text-main); font-size: 1.6rem; font-weight: 800;
    cursor: pointer; transition: all 0.2s; display: flex; align-items: center; justify-content: center;
}
.pin-btn:hover { background: #edf2f7; transform: translateY(-3px); box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
.pin-btn:active { background: var(--primary); color: white; transform: scale(0.95); }
.pin-btn.clear { color: var(--danger); background: #fff5f5; }

/* --- ANA PANEL (PREMIUM SIDEBAR DÜZENİ) --- */
#main-panel {
    display: flex;
    width: 100%;
    height: 100vh;
    background: var(--bg-main);
}

/* Sidebar */
#sidebar {
    width: 300px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 40px 24px;
    z-index: 100;
}

.sidebar-header { margin-bottom: 50px; }
.logo { font-size: 1.8rem; font-weight: 900; letter-spacing: -1px; color: var(--accent); margin-bottom: 15px; }
.logo span { color: var(--primary); }

#user-info-v2 {
    background: var(--primary-light);
    padding: 15px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
}
#user-info-text strong { color: var(--primary); }

.sidebar-nav { flex-grow: 1; display: flex; flex-direction: column; gap: 8px; }
.nav-item {
    padding: 16px 20px; border-radius: 14px; border: none; background: transparent; color: var(--text-muted);
    font-size: 1.05rem; font-weight: 700; cursor: pointer; text-align: left; display: flex; align-items: center; gap: 12px; transition: all 0.3s;
}
.nav-item:hover { background: #f8f9fa; color: var(--accent); }
.nav-item.active { background: var(--primary-light); color: var(--primary); }

.sidebar-footer { margin-top: auto; padding-top: 20px; }
#logout-btn-v2 {
    width: 100%; padding: 16px; border-radius: var(--radius-md); border: 1px solid #fee2e2; background: #fff;
    color: var(--danger); font-weight: 700; cursor: pointer; transition: all 0.3s;
}
#logout-btn-v2:hover { background: var(--danger); color: white; border-color: var(--danger); }

/* İçerik Alanı */
#content-area {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#top-bar {
    padding: 30px 50px;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}
#page-title { font-size: 1.8rem; font-weight: 800; color: var(--accent); }

.section-container {
    padding: 40px 50px;
    overflow-y: auto;
    flex-grow: 1;
}

/* Bölümler */
.section { display: none; width: 100%; animation: fadeIn 0.4s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

#table-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
}

.table-card {
    background: white; padding: 45px 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color); text-align: center; cursor: pointer; transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.table-card:hover { transform: translateY(-12px); box-shadow: var(--shadow-premium); border-color: var(--primary); }

.table-num { font-size: 1.8rem; font-weight: 900; color: var(--accent); margin-bottom: 8px; }
.status-text { font-size: 1rem; color: var(--text-muted); font-weight: 600; }

.table-card.empty { border-bottom: 8px solid var(--success); }
.table-card.occupied { border-bottom: 8px solid var(--warning); }
.table-card.payment_requested { border-bottom: 8px solid var(--danger); animation: pulse 1.5s infinite; }

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); border-color: var(--danger); }
    100% { transform: scale(1); }
}

/* Yönetici Gridi */
.admin-grid { display: grid; grid-template-columns: 1fr 1.8fr; gap: 40px; }
.admin-card { background: white; padding: 35px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); border: 1px solid var(--border-color); }
.admin-card h3 { margin-bottom: 30px; font-weight: 800; font-size: 1.4rem; color: var(--accent); }

.form-group { display: flex; flex-direction: column; gap: 18px; margin-bottom: 30px; }
.form-group input, .form-group select {
    padding: 18px; border-radius: var(--radius-md); border: 1px solid #edf2f7; background: #f8f9fa; font-size: 1rem; font-weight: 600; outline: none; transition: all 0.3s;
}
.form-group input:focus, .form-group select:focus { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(193, 158, 93, 0.1); }

.action-btn {
    padding: 18px; background: var(--primary); color: white; border: none; border-radius: var(--radius-md); font-weight: 800; font-size: 1.1rem; cursor: pointer; transition: all 0.3s;
}
.action-btn:hover { background: #b18e52; transform: translateY(-3px); box-shadow: 0 8px 20px rgba(193,158,93,0.3); }

.admin-list { list-style: none; margin-top: 30px; }
.admin-list li { padding: 18px; border-bottom: 1px solid #f7fafc; display: flex; justify-content: space-between; align-items: center; font-weight: 700; color: #4a5568; }

.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th { text-align: left; padding: 15px; background: #f8f9fa; color: var(--text-muted); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1.5px; border-bottom: 2px solid #edf2f7; }
.admin-table td { padding: 18px 15px; border-bottom: 1px solid #f7fafc; font-weight: 700; color: var(--accent); }

/* Responsive Mobil */
@media (max-width: 992px) {
    #sidebar { width: 80px; padding: 30px 10px; }
    .logo, #user-info-v2, .nav-item span, .sidebar-footer span { display: none; }
    .logo { visibility: hidden; width: 0; height: 0; }
    #content-area { width: calc(100% - 80px); }
    .admin-grid { grid-template-columns: 1fr; }
}