/**
 * BAiBU TOMER E-Sinav Sistemi - Tasarim Sistemi
 * Light Mode Kurumsal Tema
 * Renk Referansi: Universite logosu (yesil #006838, mavi #1a3a5c)
 */

/* ============================================
   CSS DEGISKENLERI
   ============================================ */
:root {
    /* Ana Renkler */
    --color-primary: #006838;
    --color-primary-hover: #005a2f;
    --color-primary-light: #e8f5ee;
    --color-primary-rgb: 0, 104, 56;

    --color-sidebar: #1a3a5c;
    --color-sidebar-hover: #234b73;
    --color-sidebar-active: #006838;

    /* Arka Plan */
    --color-bg: #f4f6f9;
    --color-bg-card: #ffffff;
    --color-bg-header: #f8fafc;

    /* Metin */
    --color-text: #0f172a;
    --color-text-secondary: #64748b;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #ffffff;

    /* Kenarlıklar */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* Durum Renkleri */
    --color-success: #16a34a;
    --color-success-bg: #dcfce7;
    --color-success-border: #bbf7d0;

    --color-warning: #d97706;
    --color-warning-bg: #fef3c7;
    --color-warning-border: #fde68a;

    --color-danger: #dc2626;
    --color-danger-bg: #fee2e2;
    --color-danger-border: #fecaca;

    --color-info: #2563eb;
    --color-info-bg: #dbeafe;
    --color-info-border: #bfdbfe;

    /* Olculer */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --topbar-height: 64px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Golge */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 10px 25px rgba(0, 0, 0, 0.08);

    /* Gecis */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   RESET & TEMEL
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

/* Kurumsal Mazgal Arka Plan */
body.app-layout {
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
}

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

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

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   TIPOGRAFI
   ============================================ */
.page-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--color-text);
    line-height: 1.2;
}

.section-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    line-height: 1.3;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--color-text);
    line-height: 1.4;
}

.section-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

.text-secondary {
    color: var(--color-text-secondary);
}

.text-tertiary {
    color: var(--color-text-tertiary);
}

.caption {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.kpi-number {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
}

/* ============================================
   LAYOUT - SIDEBAR + ICERIK
   ============================================ */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    color: var(--color-text-inverse);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 40;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-slow), transform var(--transition-slow);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: var(--topbar-height);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    flex-shrink: 0;
    object-fit: contain;
    background: white;
    padding: 2px;
}

.sidebar-brand {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-brand-name {
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.sidebar-brand-sub {
    font-size: 11px;
    font-weight: 400;
    opacity: 0.6;
    white-space: nowrap;
}

/* Sidebar Navigasyon */
.sidebar-nav {
    padding: 12px 10px;
    flex: 1;
}

.sidebar-section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.4);
    padding: 16px 12px 6px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 12px;
    height: 44px;
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
    white-space: nowrap;
}

.sidebar-item:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

.sidebar-item.active {
    background: var(--color-sidebar-active);
    color: #ffffff;
    font-weight: 600;
}

.sidebar-item .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.8;
}

.sidebar-item.active .icon {
    opacity: 1;
}

.sidebar-item .label {
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Sidebar Alt Menu */
.sidebar-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.sidebar-children.open {
    max-height: 300px;
}

.sidebar-child-item {
    display: flex;
    align-items: center;
    padding: 0 12px 0 46px;
    height: 36px;
    color: rgba(255, 255, 255, 0.55);
    font-size: 13px;
    font-weight: 400;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-child-item:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
}

.sidebar-child-item.active {
    color: #ffffff;
    font-weight: 500;
}

/* Sidebar Chevron */
.sidebar-item .chevron {
    margin-left: auto;
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
    opacity: 0.5;
}

.sidebar-item .chevron.open {
    transform: rotate(90deg);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 12px 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Sidebar Collapsed */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-brand,
.sidebar.collapsed .label,
.sidebar.collapsed .chevron,
.sidebar.collapsed .sidebar-section-label,
.sidebar.collapsed .sidebar-children {
    display: none;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 16px;
}

.sidebar.collapsed .sidebar-item {
    justify-content: center;
    padding: 0;
}

/* Ana Icerik */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-slow);
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed ~ .main-content,
.main-content.sidebar-collapsed {
    margin-left: var(--sidebar-collapsed-width);
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 30;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.topbar-toggle:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.breadcrumb a {
    color: var(--color-text-secondary);
}

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

.breadcrumb .separator {
    color: var(--color-text-tertiary);
    font-size: 11px;
}

.breadcrumb .current {
    color: var(--color-text);
    font-weight: 500;
}

/* Sayfa Icerigi */
.page-content {
    padding: 24px;
    flex: 1;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.page-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-description {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ============================================
   KARTLAR
   ============================================ */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 24px;
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-clickable:hover {
    transform: translateY(-1px);
    cursor: pointer;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border-light);
}

.card-body {
    /* Icerik alani */
}

.card-footer {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
}

/* KPI Kartlari */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 20px 24px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.kpi-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.kpi-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.kpi-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.kpi-value {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--color-text);
}

.kpi-change {
    font-size: 12px;
    font-weight: 500;
    margin-top: 4px;
}

.kpi-change.positive { color: var(--color-success); }
.kpi-change.negative { color: var(--color-danger); }

.kpi-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.kpi-icon.green { background: var(--color-success-bg); color: var(--color-success); }
.kpi-icon.blue { background: var(--color-info-bg); color: var(--color-info); }
.kpi-icon.yellow { background: var(--color-warning-bg); color: var(--color-warning); }
.kpi-icon.red { background: var(--color-danger-bg); color: var(--color-danger); }

/* ============================================
   BUTONLAR
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    line-height: 1;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 12px 28px;
    font-size: 15px;
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
}

.btn-icon.btn-sm {
    width: 30px;
    height: 30px;
    padding: 6px;
}

/* Buton Renkleri */
.btn-primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: white;
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-border-light);
    border-color: var(--color-border);
    color: var(--color-text);
}

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

.btn-danger:hover:not(:disabled) {
    background: #b91c1c;
    border-color: #b91c1c;
    color: white;
}

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

.btn-success:hover:not(:disabled) {
    background: #15803d;
    border-color: #15803d;
    color: white;
}

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

.btn-warning:hover:not(:disabled) {
    background: #b45309;
    border-color: #b45309;
    color: white;
}

.btn-outline-primary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline-primary:hover:not(:disabled) {
    background: var(--color-primary);
    color: white;
}

.btn-outline-danger {
    background: transparent;
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-outline-danger:hover:not(:disabled) {
    background: var(--color-danger);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-bg);
    color: var(--color-text);
}

/* ============================================
   FORM ELEMANLARI
   ============================================ */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: 4px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    height: 42px;
    padding: 0 12px;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-textarea {
    height: auto;
    min-height: 100px;
    padding: 10px 12px;
    resize: vertical;
}

.form-select {
    appearance: none;
    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='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-error {
    font-size: 12px;
    color: var(--color-danger);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

/* Input Group */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-input {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group .btn {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    border-left: none;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0 12px;
    font-size: 14px;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
}

/* ============================================
   TABLOLAR
   ============================================ */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-card);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table thead {
    background: var(--color-bg-header);
}

.table th {
    padding: 12px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
    vertical-align: middle;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table tbody tr:hover {
    background: rgba(0, 104, 56, 0.02);
}

.table .actions {
    display: flex;
    gap: 4px;
}

/* ============================================
   BADGE / ETIKET
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
    line-height: 1.2;
}

.badge-sm {
    padding: 2px 8px;
    font-size: 11px;
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

.badge-info {
    background: var(--color-info-bg);
    color: var(--color-info);
}

.badge-primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-secondary {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

/* ============================================
   MODAL
   ============================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 520px;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-slow);
}

.modal-backdrop.active .modal {
    transform: scale(1) translateY(0);
}

.modal-lg {
    max-width: 720px;
}

.modal-xl {
    max-width: 960px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--color-border);
}

/* ============================================
   TOAST / BILDIRIM
   ============================================ */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 400px;
}

.toast {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 14px 18px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    animation: toastIn 0.3s ease forwards;
    position: relative;
}

.toast.hiding {
    animation: toastOut 0.3s ease forwards;
}

.toast-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 1px;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.toast-message {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.toast-close {
    width: 20px;
    height: 20px;
    border: none;
    background: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    flex-shrink: 0;
}

.toast-close:hover {
    color: var(--color-text);
}

.toast.toast-success { border-left: 3px solid var(--color-success); }
.toast.toast-error { border-left: 3px solid var(--color-danger); }
.toast.toast-warning { border-left: 3px solid var(--color-warning); }
.toast.toast-info { border-left: 3px solid var(--color-info); }

.toast.toast-success .toast-icon { color: var(--color-success); }
.toast.toast-error .toast-icon { color: var(--color-danger); }
.toast.toast-warning .toast-icon { color: var(--color-warning); }
.toast.toast-info .toast-icon { color: var(--color-info); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(40px); }
}

/* ============================================
   FLASH MESAJLARI
   ============================================ */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 14px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 16px;
}

.alert-success {
    background: var(--color-success-bg);
    color: #166534;
    border: 1px solid var(--color-success-border);
}

.alert-danger {
    background: var(--color-danger-bg);
    color: #991b1b;
    border: 1px solid var(--color-danger-border);
}

.alert-warning {
    background: var(--color-warning-bg);
    color: #92400e;
    border: 1px solid var(--color-warning-border);
}

.alert-info {
    background: var(--color-info-bg);
    color: #1e40af;
    border: 1px solid var(--color-info-border);
}

/* ============================================
   TABS
   ============================================ */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    gap: 0;
    margin-bottom: 24px;
}

.tab {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition-fast);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: inherit;
}

.tab:hover {
    color: var(--color-text);
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   DROPDOWN
   ============================================ */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    min-width: 180px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 4px;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 14px;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
    text-decoration: none;
    border: none;
    background: none;
    width: 100%;
    font-family: inherit;
}

.dropdown-item:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.dropdown-item.danger {
    color: var(--color-danger);
}

.dropdown-item.danger:hover {
    background: var(--color-danger-bg);
}

.dropdown-divider {
    height: 1px;
    background: var(--color-border-light);
    margin: 4px 0;
}

/* ============================================
   BILDIRIM BADGE
   ============================================ */
.notification-btn {
    position: relative;
}

.notification-count {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 18px;
    height: 18px;
    background: var(--color-danger);
    color: white;
    font-size: 10px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-bg-card);
}

/* ============================================
   KULLANICI MENU
   ============================================ */
.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-menu:hover {
    background: var(--color-bg);
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
}

.user-role {
    font-size: 11px;
    color: var(--color-text-tertiary);
}

/* ============================================
   GRID SISTEMI
   ============================================ */
.grid {
    display: grid;
    gap: 16px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-full { grid-column: 1 / -1; }

/* ============================================
   YARDIMCI SINIFLAR
   ============================================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }

.p-0 { padding: 0; }
.p-2 { padding: 8px; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.text-lg { font-size: 18px; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-w-0 { min-width: 0; }
.overflow-hidden { overflow: hidden; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.whitespace-nowrap { white-space: nowrap; }

.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.border { border: 1px solid var(--color-border); }
.border-b { border-bottom: 1px solid var(--color-border); }
.border-t { border-top: 1px solid var(--color-border); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.cursor-pointer { cursor: pointer; }
.select-none { user-select: none; }

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    background: var(--color-primary);
}

.progress-fill.success { background: var(--color-success); }
.progress-fill.warning { background: var(--color-warning); }
.progress-fill.danger { background: var(--color-danger); }

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-secondary);
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    opacity: 0.4;
}

.empty-state-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.empty-state-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

/* ============================================
   LOADING / SPINNER
   ============================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: inherit;
}

/* ============================================
   GIRIS SAYFASI
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background-color: var(--color-bg);
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
}

.login-container {
    width: 100%;
    max-width: 440px;
}

.login-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.login-header {
    text-align: center;
    padding: 32px 32px 24px;
    border-bottom: 1px solid var(--color-border-light);
}

.login-logo {
    width: 72px;
    height: 72px;
    margin: 0 auto 16px;
    border-radius: var(--radius-lg);
    object-fit: contain;
}

.login-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.login-subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.login-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border);
}

.login-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: inherit;
}

.login-tab:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.login-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.login-body {
    padding: 24px 32px 32px;
}

.login-footer {
    text-align: center;
    padding: 16px;
    background: var(--color-bg);
    font-size: 12px;
    color: var(--color-text-tertiary);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   ANIMASYONLAR
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    animation: revealUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.reveal-delay-1 { animation-delay: 0.1s; }
.reveal-delay-2 { animation-delay: 0.2s; }
.reveal-delay-3 { animation-delay: 0.3s; }
.reveal-delay-4 { animation-delay: 0.4s; }

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0 !important;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .mobile-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 35;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .mobile-overlay.active {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 768px) {
    .page-content {
        padding: 16px;
    }

    .card {
        padding: 16px;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .table-wrapper {
        font-size: 13px;
    }

    .table th,
    .table td {
        padding: 10px 12px;
    }

    .login-body {
        padding: 20px 24px 28px;
    }

    .login-header {
        padding: 24px 24px 20px;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        padding: 0 16px;
    }

    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
    .sidebar,
    .topbar,
    .toast-container,
    .btn,
    .no-print {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
    }

    .page-content {
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }

    body {
        background: white;
        color: black;
    }
}