/* =============================================
   VERGİ YÖNETİM SİSTEMİ - DARK THEME
   ============================================= */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a2e;
    --bg-card-hover: #1f1f35;
    --bg-input: #16162a;
    --border-color: #2a2a40;
    --border-accent: #3a3a55;
    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-muted: #555570;
    --accent: #6c5ce7;
    --accent-hover: #7d6ff0;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --success: #00d68f;
    --success-bg: rgba(0, 214, 143, 0.12);
    --danger: #ff4757;
    --danger-bg: rgba(255, 71, 87, 0.12);
    --warning: #ffa502;
    --warning-bg: rgba(255, 165, 2, 0.12);
    --info: #1e90ff;
    --info-bg: rgba(30, 144, 255, 0.12);
    --sidebar-width: 260px;
    --topbar-height: 60px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-accent); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    left: 0; top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
}

.logo i { font-size: 1.5rem; }

.user-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
}

.user-badge i { font-size: 1.6rem; color: var(--accent); }
.user-name { display: block; font-weight: 600; font-size: 0.9rem; }
.user-role {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.role-admin { background: var(--danger-bg); color: var(--danger); }
.role-vergici { background: var(--success-bg); color: var(--success); }
.role-user { background: var(--info-bg); color: var(--info); }

.nav-menu {
    list-style: none;
    flex: 1;
    padding: 12px;
    overflow-y: auto;
}

.nav-divider {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    padding: 16px 12px 6px;
    font-weight: 600;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.nav-item a:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.nav-item.active a {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.nav-item a i { width: 20px; text-align: center; }

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--danger);
    text-decoration: none;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: 0.9rem;
}
.logout-btn:hover { background: var(--danger-bg); }

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: var(--transition);
}

.topbar {
    position: sticky;
    top: 0;
    height: var(--topbar-height);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 24px;
    z-index: 50;
    gap: 16px;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    display: none;
}

.page-title {
    font-size: 1.1rem;
    font-weight: 600;
    flex: 1;
}

.topbar-right { display: flex; align-items: center; gap: 16px; }
.datetime { color: var(--text-muted); font-size: 0.85rem; }

.content-area { padding: 24px; }

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.card:hover { border-color: var(--border-accent); }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ===== STAT CARDS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.stat-icon.purple { background: var(--accent-glow); color: var(--accent); }
.stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-icon.red { background: var(--danger-bg); color: var(--danger); }
.stat-icon.blue { background: var(--info-bg); color: var(--info); }
.stat-icon.orange { background: var(--warning-bg); color: var(--warning); }

.stat-info h3 { font-size: 1.5rem; font-weight: 700; }
.stat-info p { color: var(--text-secondary); font-size: 0.8rem; margin-top: 2px; }

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

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

thead th {
    background: var(--bg-secondary);
    padding: 12px 16px;
    text-align: left;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

tbody tr { transition: var(--transition); }
tbody tr:hover { background: var(--bg-card-hover); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 4px 15px var(--accent-glow); }

.btn-success { background: var(--success); color: #000; }
.btn-success:hover { opacity: 0.9; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }

.btn-warning { background: var(--warning); color: #000; }
.btn-warning:hover { opacity: 0.9; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-accent);
    color: var(--text-primary);
}
.btn-outline:hover { background: var(--bg-card); }

.btn-sm { padding: 6px 14px; font-size: 0.78rem; }

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

/* ===== TAX ACTION BUTTONS ===== */
.tax-actions { display: flex; gap: 6px; flex-wrap: wrap; }

.btn-yazildi {
    background: linear-gradient(135deg, #00d68f, #00b377);
    color: #fff;
    font-weight: 700;
    text-shadow: 0 0 8px rgba(0, 214, 143, 0.5);
    border: 1px solid rgba(0, 214, 143, 0.3);
}
.btn-yazildi:hover {
    box-shadow: 0 0 15px rgba(0, 214, 143, 0.5), 0 0 30px rgba(0, 214, 143, 0.2), inset 0 0 15px rgba(0, 214, 143, 0.1);
    transform: translateY(-1px);
}

.btn-hatali {
    background: linear-gradient(135deg, #ff4757, #cc3645);
    color: #fff;
    font-weight: 700;
    text-shadow: 0 0 8px rgba(255, 71, 87, 0.5);
    border: 1px solid rgba(255, 71, 87, 0.3);
}
.btn-hatali:hover {
    box-shadow: 0 0 15px rgba(255, 71, 87, 0.5), 0 0 30px rgba(255, 71, 87, 0.2), inset 0 0 15px rgba(255, 71, 87, 0.1);
    transform: translateY(-1px);
}

.btn-fis {
    background: linear-gradient(135deg, #ffa502, #cc8402);
    color: #000;
    font-weight: 700;
    text-shadow: 0 0 8px rgba(255, 165, 2, 0.3);
    border: 1px solid rgba(255, 165, 2, 0.3);
}
.btn-fis:hover {
    box-shadow: 0 0 15px rgba(255, 165, 2, 0.5), 0 0 30px rgba(255, 165, 2, 0.2), inset 0 0 15px rgba(255, 165, 2, 0.1);
    transform: translateY(-1px);
}

.btn-take {
    background: linear-gradient(135deg, var(--accent), #5a4bd1);
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    padding: 12px 24px;
    text-shadow: 0 0 10px rgba(108, 92, 231, 0.6);
    border: 1px solid rgba(108, 92, 231, 0.4);
    position: relative;
    overflow: hidden;
}
.btn-take::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: rotate(45deg);
    transition: 0.5s;
}
.btn-take:hover::before { left: 100%; }
.btn-take:hover {
    box-shadow: 0 0 20px var(--accent-glow), 0 0 40px rgba(108, 92, 231, 0.15);
    transform: translateY(-2px);
}

/* Neon glow effects */
.btn-primary {
    text-shadow: 0 0 8px rgba(108, 92, 231, 0.5);
}
.btn-primary:hover {
    box-shadow: 0 0 15px var(--accent-glow), 0 0 30px rgba(108, 92, 231, 0.15);
}

.neon-border {
    border: 1px solid var(--accent);
    box-shadow: 0 0 10px var(--accent-glow), inset 0 0 10px rgba(108, 92, 231, 0.05);
}

.neon-text {
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow), 0 0 20px rgba(108, 92, 231, 0.2);
}

/* ===== STATUS BADGES ===== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-available { background: var(--success-bg); color: var(--success); }
.badge-taken { background: var(--info-bg); color: var(--info); }
.badge-yazildi { background: var(--success-bg); color: var(--success); }
.badge-hatali { background: var(--danger-bg); color: var(--danger); }
.badge-fis { background: var(--warning-bg); color: var(--warning); }
.badge-completed { background: rgba(150,150,180,0.15); color: #aaa; }

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 11px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238888aa' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control { resize: vertical; min-height: 100px; }

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

/* ===== TAX CARD ===== */
.tax-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
}

.tax-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tax-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.tax-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.tax-card .tax-field {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.88rem;
}

.tax-card .tax-field:last-of-type { border-bottom: none; }
.tax-field .label { color: var(--text-muted); font-size: 0.8rem; }
.tax-field .value { font-weight: 600; text-align: right; }

.tax-card-actions {
    margin-top: 16px;
    display: flex;
    gap: 8px;
    justify-content: center;
}

.dekont-preview {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}
.dekont-preview:hover { transform: scale(1.1); border-color: var(--accent); }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 28px;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}
.modal-close:hover { color: var(--danger); }

/* ===== LOGIN/REGISTER ===== */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-primary);
    background-image: radial-gradient(circle at 20% 50%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
                      radial-gradient(circle at 80% 20%, rgba(0, 214, 143, 0.05) 0%, transparent 50%);
}

.auth-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
}

.auth-box .logo {
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.auth-box .subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 28px;
    font-size: 0.9rem;
}

.auth-box .btn { width: 100%; justify-content: center; padding: 13px; }

.auth-switch {
    text-align: center;
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.auth-switch a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover { text-decoration: underline; }

.error-message {
    background: var(--danger-bg);
    color: var(--danger);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.85rem;
    display: none;
}

.error-message.show { display: block; }

/* ===== TOAST ===== */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    min-width: 260px;
    box-shadow: var(--shadow);
}

.toast-success { background: #00b377; }
.toast-error { background: #cc3645; }
.toast-warning { background: #cc8402; }
.toast-info { background: #1a7ae6; }

@keyframes toastIn { from { opacity: 0; transform: translateX(50px); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(50px); } }

/* ===== LOADING ===== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i { font-size: 3rem; margin-bottom: 16px; opacity: 0.3; }
.empty-state p { font-size: 0.95rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .sidebar-toggle { display: block; }
    .tax-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .content-area { padding: 16px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .auth-box { margin: 16px; padding: 24px; }
}

/* ===== DEKONT MODAL ===== */
.dekont-modal-img {
    max-width: 100%;
    max-height: 70vh;
    border-radius: var(--radius-sm);
}

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 20px;
}

.pagination a, .pagination span {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

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

.pagination a:hover { background: var(--bg-card-hover); color: var(--text-primary); }

.pagination .active {
    background: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
}

/* ===== FILE INPUT ===== */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    background: var(--bg-input);
    border: 2px dashed var(--border-accent);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
    cursor: pointer;
}

.file-input-label:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== TABS ===== */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ===== SEARCH ===== */
.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
}

/* ===== IMAGE LIGHTBOX ===== */
.lightbox {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    cursor: pointer;
}
.lightbox.active { display: flex; }
.lightbox img { max-width: 90%; max-height: 90vh; border-radius: var(--radius); }