/* ==========================================
   AKDAĞ DIGITAL
   Profesyonel Yönetim Paneli Tasarım Sistemi
   ========================================== */

:root {
    --bg: #0B0C0D;
    --sidebar: #111315;
    --card: #171A1C;
    --border: #2A2E30;
    --text: #F6F7F7;
    --muted: #929A9E;
    --accent: #B7CA29;
    --accent-hover: #C8DC36;
    --danger: #EF6666;
    --success: #66C994;
    --warning: #E5B85C;

    --sidebar-width: 258px;
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ==========================================
   ANA UYGULAMA YAPISI
   ========================================== */

.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 28px 22px;
    border-bottom: 1px solid var(--border);
}

.brand-title {
    color: var(--accent);
    font-size: 21px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.brand-subtitle {
    color: var(--muted);
    font-size: 11px;
    margin-top: 5px;
}

.sidebar-nav {
    padding: 18px 12px;
    flex: 1;
}

.nav-label {
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    padding: 18px 12px 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin-bottom: 5px;
    border-radius: 9px;
    color: var(--muted);
    transition: background 0.2s, color 0.2s;
}

.nav-link:hover {
    background: #202426;
    color: var(--text);
}

.nav-link.active {
    background: rgba(183, 202, 41, 0.12);
    color: var(--accent);
    font-weight: 700;
}

.nav-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 18px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 12px;
}

/* ==========================================
   ANA İÇERİK
   ========================================== */

.main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-width: 0;
}

.topbar {
    min-height: 84px;
    padding: 20px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.page-title {
    margin: 0;
    font-size: 25px;
    font-weight: 750;
}

.page-subtitle {
    color: var(--muted);
    font-size: 13px;
    margin-top: 5px;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.user-badge {
    padding: 9px 14px;
    border: 1px solid var(--border);
    border-radius: 9px;
    color: var(--muted);
    font-size: 13px;
}

.content-area {
    padding: 30px 32px;
}

/* ==========================================
   BİLGİ KARTLARI
   ========================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 26px;
}

.stat-card,
.panel,
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.stat-card {
    padding: 22px;
}

.stat-label {
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 12px;
}

.stat-value {
    font-size: 30px;
    font-weight: 800;
}

.stat-description {
    color: var(--muted);
    font-size: 12px;
    margin-top: 10px;
}

.panel {
    margin-bottom: 24px;
    overflow: hidden;
}

.panel-header {
    padding: 20px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--border);
}

.panel-title {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
}

.panel-body {
    padding: 22px;
}

.empty-state {
    padding: 40px 20px;
    text-align: center;
    color: var(--muted);
}

/* ==========================================
   BUTONLAR
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 17px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    transition: background 0.2s, border-color 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #0B0C0D;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: #24282A;
    border-color: var(--border);
    color: var(--text);
}

.btn-secondary:hover {
    background: #303638;
}

.btn-danger {
    background: rgba(239, 102, 102, 0.12);
    color: var(--danger);
    border-color: rgba(239, 102, 102, 0.25);
}

/* ==========================================
   FORM ELEMANLARI
   ========================================== */

.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    min-height: 43px;
    padding: 11px 13px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    outline: none;
}

.form-control:focus {
    border-color: var(--accent);
}

.form-control::placeholder {
    color: #737B7F;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

/* ==========================================
   TABLOLAR
   ========================================== */

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th {
    padding: 14px 18px;
    color: var(--muted);
    background: #1C2022;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.data-table td {
    padding: 15px 18px;
    border-top: 1px solid var(--border);
    font-size: 13px;
}

.data-table tbody tr:hover {
    background: #1E2224;
}

/* ==========================================
   DURUM ETİKETLERİ
   ========================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 9px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
}

.badge-success {
    background: rgba(102, 201, 148, 0.12);
    color: var(--success);
}

.badge-warning {
    background: rgba(229, 184, 92, 0.12);
    color: var(--warning);
}

.badge-danger {
    background: rgba(239, 102, 102, 0.12);
    color: var(--danger);
}

/* ==========================================
   BİLDİRİMLER
   ========================================== */

.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 13px;
}

.alert-success {
    background: rgba(102, 201, 148, 0.1);
    border: 1px solid rgba(102, 201, 148, 0.25);
    color: var(--success);
}

.alert-danger {
    background: rgba(239, 102, 102, 0.1);
    border: 1px solid rgba(239, 102, 102, 0.25);
    color: var(--danger);
}

/* ==========================================
   MOBİL UYUMLULUK
   ========================================== */

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .sidebar {
        position: static;
        width: 100%;
        max-height: none;
    }

    .app-layout {
        flex-direction: column;
    }

    .main-content {
        width: 100%;
        margin-left: 0;
    }

    .topbar {
        padding: 18px;
    }

    .content-area {
        padding: 20px 18px;
    }

    .sidebar-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 5px;
    }

    .nav-label {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .stats-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

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

    .topbar-actions {
        flex-wrap: wrap;
    }

    .page-title {
        font-size: 21px;
    }

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