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

:root {
    /* Color Palette - Modern Dark/Glass Theme */
    --bg-main: #0a0c10;
    --bg-card: rgba(18, 22, 28, 0.7);
    --bg-sidebar: #0f1218;
    --primary: #10b981; /* Emerald */
    --primary-glow: rgba(16, 185, 129, 0.3);
    --secondary: #6366f1; /* Indigo */
    --accent: #f59e0b; /* Amber */
    --danger: #ef4444; /* Rose */
    --success: #10b981;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --border: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --sidebar-width: 260px;
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Scrollbar Customization */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-main); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Glassmorphism Classes */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

/* Main Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
aside.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-box {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: grid;
    place-items: center;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.sidebar-nav {
    flex: 1;
    padding: 0 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.85rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 10px;
    margin-bottom: 0.5rem;
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-link.active i { color: var(--primary); }
.nav-link.active { border-left: 3px solid var(--primary); }

/* Header & Main Content */
main.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
    max-width: calc(100vw - var(--sidebar-width));
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title h1 { font-size: 1.5rem; font-weight: 700; }
.page-title p { color: var(--text-muted); font-size: 0.9rem; }

/* Dashboard Widgets */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-info .label { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; display: block; }
.stat-info .value { font-size: 1.75rem; font-weight: 700; color: var(--text-main); }
.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.25rem;
}

.icon-blue { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.icon-green { background: rgba(16, 185, 129, 0.1); color: #10b981; }
.icon-red { background: rgba(239, 68, 68, 0.1); color: #ef4444; }
.icon-yellow { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }

/* Tables */
.card-table { margin-top: 2rem; }
.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th {
    text-align: left;
    padding: 1rem 1.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--text-muted); }
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    outline: none;
    transition: var(--transition);
}

/* Custom Select Arrow */
select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.4)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
    appearance: none;
    cursor: pointer;
}

/* Select İçindeki Seçeneklerin Görünürlüğü */
select.form-control option {
    background-color: #1a1e26; 
    color: #fff;
    padding: 10px;
}

.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-glow); }

/* Buttons */
.btn {
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    text-decoration: none;
    font-size: 0.9rem;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: #059669; transform: translateY(-1px); }

/* Status Badges */
.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.1); color: #10b981; }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.badge-danger { background: rgba(239, 68, 68, 0.1); color: #ef4444; }

/* Auth Page */
.auth-wrapper {
    height: 100vh;
    display: grid;
    place-items: center;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeIn 0.4s ease-out forwards; }

/* Responsive */
@media (max-width: 1024px) {
    aside.sidebar { width: 80px; }
    .nav-link span, .sidebar-header h2, .logo-text { display: none; }
    main.main-content { margin-left: 80px; width: calc(100vw - 80px); }
}