/* KALIPSAN Takımhane Yönetim Sistemi - Ana CSS */

/* =====================================================
   CSS VARIABLES - KALIPSAN TEMA
   ===================================================== */
:root {
    /* Ana Renkler - KALIPSAN Lacivert Tema */
    --primary-dark: #1B3A6D;
    --primary: #2E5090;
    --primary-light: #4A7CC9;
    --accent: #5B9BD5;
    
    /* Durum Renkleri */
    --success: #28A745;
    --success-light: #D4EDDA;
    --warning: #FFC107;
    --warning-light: #FFF3CD;
    --danger: #DC3545;
    --danger-light: #F8D7DA;
    --info: #17A2B8;
    --info-light: #D1ECF1;
    
    /* Nötr Renkler */
    --gray-900: #1A202C;
    --gray-800: #2D3748;
    --gray-700: #4A5568;
    --gray-600: #718096;
    --gray-500: #A0AEC0;
    --gray-400: #CBD5E0;
    --gray-300: #E2E8F0;
    --gray-200: #EDF2F7;
    --gray-100: #F7FAFC;
    --white: #FFFFFF;
    
    /* Gölgeler */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Geçişler */
    --transition: all 0.3s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* =====================================================
   RESET & BASE
   ===================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: var(--transition);
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    max-width: 180px;
    height: auto;
}

.sidebar-title {
    font-size: 14px;
    font-weight: 600;
    margin-top: 10px;
    opacity: 0.9;
}

.sidebar-nav {
    padding: 15px 0;
}

.nav-section {
    padding: 10px 20px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 15px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-left-color: var(--accent);
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border-left-color: var(--accent);
}

.nav-item i {
    width: 20px;
    margin-right: 12px;
    font-size: 16px;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

/* Header */
.top-header {
    background: var(--white);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--gray-800);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Notification Bell */
.notification-bell {
    position: relative;
    padding: 8px;
    background: var(--gray-100);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.notification-bell:hover {
    background: var(--gray-200);
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger);
    color: var(--white);
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 15px;
    background: var(--gray-100);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.user-menu:hover {
    background: var(--gray-200);
}

.user-avatar {
    width: 35px;
    height: 35px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-info {
    text-align: left;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--gray-800);
}

.user-role {
    font-size: 12px;
    color: var(--gray-600);
}

/* Content Area */
.content-area {
    padding: 30px;
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 20px;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* Stat Cards */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 25px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-icon.primary {
    background: rgba(46, 80, 144, 0.1);
    color: var(--primary);
}

.stat-icon.success {
    background: var(--success-light);
    color: var(--success);
}

.stat-icon.warning {
    background: var(--warning-light);
    color: #856404;
}

.stat-icon.danger {
    background: var(--danger-light);
    color: var(--danger);
}

.stat-icon.info {
    background: var(--info-light);
    color: var(--info);
}

.stat-info h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 5px;
}

.stat-info p {
    font-size: 14px;
    color: var(--gray-600);
}

/* =====================================================
   TABLES
   ===================================================== */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: var(--gray-100);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:hover {
    background: var(--gray-50);
}

/* =====================================================
   FORMS
   ===================================================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 80, 144, 0.1);
}

.form-control::placeholder {
    color: var(--gray-500);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23718096' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

.btn-success:hover {
    background: #218838;
    color: var(--white);
}

.btn-warning {
    background: var(--warning);
    color: var(--gray-900);
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-danger:hover {
    background: #c82333;
    color: var(--white);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

/* =====================================================
   BADGES & STATUS
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: var(--success-light);
    color: #155724;
}

.badge-warning {
    background: var(--warning-light);
    color: #856404;
}

.badge-danger {
    background: var(--danger-light);
    color: #721c24;
}

.badge-info {
    background: var(--info-light);
    color: #0c5460;
}

.badge-primary {
    background: rgba(46, 80, 144, 0.1);
    color: var(--primary);
}

/* Stok Durumu */
.stok-yeterli {
    color: var(--success);
}

.stok-uyari {
    color: #856404;
}

.stok-kritik {
    color: var(--danger);
    font-weight: 700;
}

.stok-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 5px;
}

.stok-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: var(--transition);
}

.stok-bar-fill.yeterli {
    background: var(--success);
}

.stok-bar-fill.uyari {
    background: var(--warning);
}

.stok-bar-fill.kritik {
    background: var(--danger);
}

/* =====================================================
   ALERTS
   ===================================================== */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: var(--success-light);
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-warning {
    background: var(--warning-light);
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-danger {
    background: var(--danger-light);
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: var(--info-light);
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* =====================================================
   LOGIN PAGE
   ===================================================== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    padding: 20px;
}

.login-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    padding: 40px;
}

.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo img {
    max-width: 200px;
    height: auto;
}

.login-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 10px;
}

.login-subtitle {
    text-align: center;
    color: var(--gray-600);
    margin-bottom: 30px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form .btn-primary {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

.login-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-600);
}

.login-footer a {
    color: var(--primary);
    font-weight: 600;
}

/* =====================================================
   NOTIFICATIONS DROPDOWN
   ===================================================== */
.notifications-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 350px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 1000;
}

.notifications-dropdown.show {
    display: block;
}

.notifications-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.notification-item {
    padding: 15px 20px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    gap: 12px;
    transition: var(--transition);
}

.notification-item:hover {
    background: var(--gray-50);
}

.notification-item.unread {
    background: rgba(46, 80, 144, 0.05);
}

.notification-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
}

.notification-text {
    font-size: 14px;
    color: var(--gray-700);
    margin-bottom: 5px;
}

.notification-time {
    font-size: 12px;
    color: var(--gray-500);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stat-cards {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .top-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .content-area {
        padding: 15px;
    }
}

/* =====================================================
   UTILITIES
   ===================================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-600); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: #856404; }
.text-danger { color: var(--danger); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }

.w-100 { width: 100%; }