@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2035;
    --bg-hover: #232b42;
    --border: #2a3352;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0b8;
    --text-muted: #6b7199;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --gradient-1: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-2: linear-gradient(135deg, #10b981, #34d399);
    --gradient-3: linear-gradient(135deg, #ef4444, #f87171);
    --gradient-4: linear-gradient(135deg, #f59e0b, #fbbf24);
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* ══════ LOGIN ══════ */
.login-wrapper {
    display:flex; align-items:center; justify-content:center;
    min-height:100vh; padding:20px;
    background: radial-gradient(ellipse at top left, #1e1b4b 0%, #0a0e1a 50%, #0a0e1a 100%);
}
.login-box {
    background: var(--bg-card); border:1px solid var(--border);
    border-radius: 24px; padding:48px 40px; width:100%; max-width:420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    backdrop-filter: blur(20px);
}
.login-brand { text-align:center; margin-bottom:8px; }
.login-brand .brand-logo {
    max-width:220px; height:auto; border-radius:12px; margin-bottom:4px;
}
.login-brand .brand-icon { font-size:3rem; display:block; margin-bottom:8px; }
.login-brand h1 {
    font-size:2.2rem; font-weight:800;
    background: var(--gradient-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}
.sidebar-logo { max-width:140px; height:auto; border-radius:8px; }
.login-box p.sub { text-align:center; color:var(--text-secondary); margin-bottom:32px; font-size:.9rem; }

.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:.82rem; font-weight:500; color:var(--text-secondary); margin-bottom:6px; }
.form-group input, .form-group select, .form-group textarea {
    width:100%; padding:12px 16px; background:var(--bg-secondary);
    border:1px solid var(--border); border-radius:var(--radius-sm);
    color:var(--text-primary); font-size:.92rem; outline:none; transition:.2s;
    font-family: 'Inter', sans-serif;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color:var(--accent); box-shadow:0 0 0 3px rgba(99,102,241,.2);
}

/* ══════ BUTTONS ══════ */
.btn {
    padding:12px 24px; border:none; border-radius:var(--radius-sm);
    font-family:'Inter',sans-serif; font-size:.88rem; font-weight:600;
    cursor:pointer; transition:all .2s; display:inline-flex; align-items:center; gap:8px;
    text-decoration:none;
}
.btn-primary { background:var(--gradient-1); color:#fff; }
.btn-primary:hover { transform:translateY(-1px); box-shadow:0 4px 20px rgba(99,102,241,.4); }
.btn-sm { padding:8px 16px; font-size:.8rem; }
.btn-lg { padding:14px 28px; font-size:1rem; }
.btn-success { background:var(--success); color:#fff; }
.btn-success:hover { background:#059669; }
.btn-danger { background:var(--danger); color:#fff; }
.btn-danger:hover { background:#dc2626; }
.btn-warning { background:var(--warning); color:#0f1117; }
.btn-ghost { background:transparent; border:1px solid #d1d5db; color:#6b7280; }
.btn-ghost:hover { border-color:var(--accent); color:var(--accent); background:rgba(99,102,241,.04); }
.btn-ghost.active, .btn-sm.active { background:var(--accent); color:#fff; border-color:var(--accent); }

.error-msg { color:var(--danger); font-size:.85rem; text-align:center; margin-top:12px; min-height:20px; }

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

.sidebar {
    width:260px; background:var(--bg-secondary); border-right:1px solid var(--border);
    display:flex; flex-direction:column; position:fixed; top:0; left:0; bottom:0; z-index:100;
    transition: transform .3s;
}
.sidebar-brand {
    padding:24px; font-size:1.2rem; font-weight:800; border-bottom:1px solid var(--border);
}
.sidebar-brand span { background:var(--gradient-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.sidebar-nav { flex:1; padding:16px 12px; display:flex; flex-direction:column; gap:3px; overflow-y:auto; }
.sidebar-nav a {
    display:flex; align-items:center; gap:12px; padding:11px 16px;
    border-radius:var(--radius-sm); color:var(--text-secondary); text-decoration:none;
    font-size:.88rem; font-weight:500; transition:.15s; white-space:nowrap;
}
.sidebar-nav a:hover { background:var(--bg-hover); color:var(--text-primary); }
.sidebar-nav a.active { background:rgba(99,102,241,.15); color:var(--accent); }
.sidebar-nav a .icon { font-size:1.1rem; width:24px; text-align:center; }
.sidebar-nav .nav-divider { height:1px; background:var(--border); margin:8px 0; }
.nav-parent { cursor:pointer; }
.nav-parent-link { display:flex; align-items:center; gap:12px; padding:11px 16px; border-radius:var(--radius-sm); color:var(--text-secondary); text-decoration:none; font-size:.88rem; font-weight:500; transition:.15s; }
.nav-parent-link:hover { background:var(--bg-hover); color:var(--text-primary); }
.nav-arrow { margin-left:auto; font-size:.7rem; transition:transform .2s; }
.nav-sub { padding-left:16px; }
.nav-sub a { font-size:.82rem; padding:9px 14px; }

.sidebar-footer { padding:16px; border-top:1px solid var(--border); }
.sidebar-footer .user-info { margin-bottom:10px; }
.sidebar-footer .user-name { font-size:.9rem; font-weight:600; color:var(--text-primary); }
.sidebar-footer .user-role { font-size:.75rem; color:var(--accent); text-transform:uppercase; letter-spacing:.5px; }
.sidebar-footer .user-company { font-size:.8rem; color:var(--text-muted); margin-top:2px; }

.main-content {
    margin-left:260px; flex:1; padding:28px 32px; min-width:0;
    background:#f5f7fa; color:#1a1a2e;
}
.page-header { margin-bottom:28px; }
.page-header h2 { font-size:1.5rem; font-weight:700; margin-bottom:4px; color:#1a1a2e; }
.page-header p { color:#6b7280; font-size:.88rem; }

/* ══════ MOBILE ══════ */
.mobile-header {
    display:none; position:fixed; top:0; left:0; right:0; z-index:99;
    background:var(--bg-secondary); border-bottom:1px solid var(--border);
    padding:12px 16px; align-items:center; justify-content:space-between;
}
.mobile-brand { font-weight:800; background:var(--gradient-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.hamburger { background:none; border:none; color:var(--text-primary); font-size:1.5rem; cursor:pointer; }

@media (max-width:768px) {
    .sidebar { transform:translateX(-100%); }
    .sidebar.open { transform:translateX(0); }
    .mobile-header { display:flex; }
    .main-content { margin-left:0; padding:70px 16px 16px; }
    .pos-layout { flex-direction:column; }
    .pos-left, .pos-right { min-width:0; }
    .stats-grid { grid-template-columns:1fr 1fr; }
    .search-bar { flex-direction:column; }
}

/* ══════ STAT CARDS ══════ */
.stats-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(200px,1fr)); gap:16px; margin-bottom:28px; }
.stat-card {
    background:#ffffff; border:1px solid #e5e7eb; border-radius:var(--radius);
    padding:22px; position:relative; overflow:hidden; transition:.2s;
}
.stat-card:hover { transform:translateY(-2px); box-shadow:0 4px 16px rgba(0,0,0,0.08); }
.stat-card .stat-icon {
    width:44px; height:44px; border-radius:10px; display:flex;
    align-items:center; justify-content:center; font-size:1.3rem; margin-bottom:14px;
}
.stat-card .stat-value { font-size:1.8rem; font-weight:800; line-height:1; color:#1a1a2e; }
.stat-card .stat-label { font-size:.82rem; color:#6b7280; margin-top:4px; }
.stat-card::after {
    content:''; position:absolute; top:0; right:0; width:90px; height:90px;
    border-radius:50%; opacity:.06; transform:translate(25px,-25px);
}
.stat-card.purple .stat-icon { background:rgba(99,102,241,.15); color:var(--accent); }
.stat-card.purple::after { background:var(--accent); }
.stat-card.green .stat-icon { background:rgba(16,185,129,.15); color:var(--success); }
.stat-card.green::after { background:var(--success); }
.stat-card.red .stat-icon { background:rgba(239,68,68,.15); color:var(--danger); }
.stat-card.red::after { background:var(--danger); }
.stat-card.gold .stat-icon { background:rgba(245,158,11,.15); color:var(--warning); }
.stat-card.gold::after { background:var(--warning); }
.stat-card.blue .stat-icon { background:rgba(59,130,246,.15); color:var(--info); }
.stat-card.blue::after { background:var(--info); }

.card {
    background:#ffffff; border:1px solid #e5e7eb;
    border-radius:var(--radius); overflow:hidden;
}
.card-header {
    padding:18px 22px; border-bottom:1px solid #e5e7eb;
    display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:8px;
}
.card-header h3 { font-size:1rem; font-weight:600; color:#1a1a2e; }
.card-body { padding:22px; }
.card-actions { display:flex; gap:8px; flex-wrap:wrap; }

table { width:100%; border-collapse:collapse; }
thead th {
    text-align:left; padding:11px 14px; font-size:.78rem; font-weight:600;
    color:#6b7280; text-transform:uppercase; letter-spacing:.5px;
    border-bottom:1px solid #e5e7eb; white-space:nowrap; background:#f9fafb;
}
tbody td { padding:11px 14px; font-size:.86rem; border-bottom:1px solid #f3f4f6; color:#374151; }
tbody tr:hover { background:#f9fafb; }
tbody tr:last-child td { border-bottom:none; }

.badge {
    display:inline-block; padding:4px 10px; border-radius:20px;
    font-size:.73rem; font-weight:600;
}
.badge-active { background:rgba(16,185,129,.15); color:var(--success); }
.badge-inactive { background:rgba(239,68,68,.15); color:var(--danger); }

/* ══════ POS LAYOUT ══════ */
.pos-layout { display:flex; gap:20px; }
.pos-left { flex:2; min-width:0; }
.pos-right { flex:1; min-width:300px; }

.pos-barcode-area {
    display:flex; gap:10px; margin-bottom:12px;
}
.pos-barcode-area input {
    flex:1; padding:14px 18px; background:#ffffff; border:2px solid var(--accent);
    border-radius:var(--radius); color:#1a1a2e; font-size:1.1rem; outline:none;
}
.pos-barcode-area input:focus { box-shadow:0 0 0 4px rgba(99,102,241,.2); }

.pos-summary { position:sticky; top:80px; }
.pos-total-label { font-size:.85rem; color:#6b7280; text-transform:uppercase; letter-spacing:1px; }
.pos-total-amount {
    font-size:2.4rem; font-weight:800; margin:4px 0 16px;
    background:var(--gradient-1); -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}
.pos-net {
    display:flex; justify-content:space-between; align-items:center;
    padding:12px 0; margin:8px 0; border-top:1px solid #e5e7eb;
    font-size:1.1rem; color:#1a1a2e;
}
.pos-net strong { font-size:1.4rem; color:var(--success); }

/* Main content form overrides (beyaz tema) */
.main-content .form-group label { color:#374151; }
.main-content .form-group input,
.main-content .form-group select,
.main-content .form-group textarea {
    background:#ffffff; border:1px solid #d1d5db; color:#1a1a2e;
}
.main-content .form-group input:focus,
.main-content .form-group select:focus,
.main-content .form-group textarea:focus {
    border-color:var(--accent); background:#ffffff; box-shadow:0 0 0 3px rgba(99,102,241,.1);
}
.main-content .form-group input::placeholder { color:#9ca3af; }
.main-content .text-muted { color:#9ca3af; }
.main-content code { color:var(--accent); }

/* ══════ MODAL ══════ */
.modal-overlay {
    position:fixed; inset:0; background:rgba(0,0,0,.65); z-index:1000;
    display:flex; align-items:center; justify-content:center; padding:20px;
    backdrop-filter:blur(4px);
}
.modal {
    background:#ffffff; border:1px solid #e5e7eb; border-radius:18px;
    padding:32px; width:100%; max-width:500px; box-shadow:0 20px 60px rgba(0,0,0,.15);
    max-height:90vh; overflow-y:auto; color:#1a1a2e;
}
.modal h3 { font-size:1.15rem; margin-bottom:22px; color:#1a1a2e; }
.modal .form-group label { color:#374151; }
.modal .form-group input, .modal .form-group select, .modal .form-group textarea {
    background:#f9fafb; border-color:#d1d5db; color:#1a1a2e;
}
.modal .form-group input:focus, .modal .form-group select:focus {
    border-color:var(--accent); background:#fff;
}
.modal-actions { display:flex; gap:12px; justify-content:flex-end; margin-top:24px; }

/* Receipt Modal */
.receipt-modal { max-width:400px; background:#fff; color:#000; border:none; }
.receipt-modal h3 { color:#000; }
.receipt-content { font-family:monospace; font-size:.85rem; line-height:1.6; }
.receipt-content .receipt-header { text-align:center; border-bottom:1px dashed #999; padding-bottom:8px; margin-bottom:8px; }
.receipt-content .receipt-line { display:flex; justify-content:space-between; }
.receipt-content .receipt-total { border-top:1px dashed #999; padding-top:8px; margin-top:8px; font-weight:bold; font-size:1rem; }

/* ══════ SEARCH BAR ══════ */
.search-bar { display:flex; gap:10px; margin-bottom:20px; flex-wrap:wrap; }
.search-bar input {
    flex:1; min-width:200px; padding:10px 16px; background:#ffffff;
    border:1px solid #d1d5db; border-radius:var(--radius-sm);
    color:#1a1a2e; font-size:.9rem; outline:none;
}
.search-bar input:focus { border-color:var(--accent); box-shadow:0 0 0 3px rgba(99,102,241,.1); }

/* ══════ PAGINATION ══════ */
.pagination { display:flex; align-items:center; justify-content:center; gap:8px; padding:16px 0; }
.pagination button {
    padding:8px 14px; border:1px solid #d1d5db; border-radius:var(--radius-sm);
    background:#ffffff; color:#374151; cursor:pointer;
    font-size:.85rem; transition:.15s;
}
.pagination button:hover { border-color:var(--accent); color:var(--accent); }
.pagination button:disabled { opacity:.4; cursor:not-allowed; }
.pagination span { color:#6b7280; font-size:.85rem; }

/* ══════ UTILITIES ══════ */
.hidden { display:none !important; }
.text-center { text-align:center; }
.text-muted { color:#9ca3af; }
.mt-2 { margin-top:8px; }
.mt-4 { margin-top:16px; }
.mb-4 { margin-bottom:16px; }
.gap-2 { gap:8px; }
.flex { display:flex; }

.spinner {
    width:40px; height:40px; border:3px solid var(--border);
    border-top-color:var(--accent); border-radius:50%;
    animation:spin .8s linear infinite; margin:40px auto;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* ══════ 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); font-size:.86rem; font-weight:500;
    box-shadow:0 8px 24px rgba(0,0,0,.4); animation:slideIn .3s ease;
    min-width:280px; max-width:400px;
}
.toast-success { background:var(--success); color:#fff; }
.toast-error { background:var(--danger); color:#fff; }
.toast-info { background:var(--info); color:#fff; }
@keyframes slideIn { from { transform:translateX(100%); opacity:0; } to { transform:translateX(0); opacity:1; } }

/* Print Styles */
@media print {
    body * { visibility:hidden; }
    #receiptContent, #receiptContent * { visibility:visible; }
    #receiptContent { position:absolute; left:0; top:0; width:80mm; }
}

/* ══════ POS FULLSCREEN ══════ */
.pos-fullscreen-mode {
    position:fixed !important; inset:0 !important; z-index:200 !important;
    margin:0 !important; padding:16px !important;
    background:#f5f7fa !important; overflow-y:auto;
}
.pos-fullscreen-mode .page-header { margin-bottom:12px !important; }
.pos-fullscreen-mode .pos-layout { height:calc(100vh - 80px); }
.pos-fullscreen-mode .pos-left { overflow-y:auto; }
.pos-fullscreen-mode .pos-right .card { box-shadow:0 4px 24px rgba(99,102,241,.12); border:2px solid var(--accent); }
.pos-fullscreen-mode .pos-total-amount { font-size:3rem !important; }

/* ══════ PERMISSION TOGGLE ══════ */
.perm-toggle {
    display:inline-flex; align-items:center; gap:6px;
    cursor:pointer; user-select:none;
}
.perm-toggle input[type="checkbox"] {
    width:18px; height:18px; cursor:pointer;
    accent-color:var(--accent);
}
.perm-label { font-size:.82rem; color:#374151; font-weight:500; }

/* ══════ STOCK TABS ══════ */
.stock-tabs {
    display:flex; flex-wrap:wrap; gap:6px; margin-bottom:16px;
    background:#f1f5f9; padding:6px; border-radius:10px;
}
.stab {
    padding:8px 14px; border:none; background:transparent; border-radius:8px;
    cursor:pointer; font-size:.85rem; font-weight:500; color:#64748b; transition:all .2s;
}
.stab:hover { background:#e2e8f0; color:#334155; }
.stab.active { background:var(--accent); color:#fff; box-shadow:0 2px 8px rgba(99,102,241,.25); }
.spinner { text-align:center; padding:40px; color:var(--accent); font-size:1.2rem; }
.spinner::after { content:'⏳ Yükleniyor...'; }
.flex { display:flex; }
.gap-2 { gap:6px; }
.mt-2 { margin-top:8px; }
.mb-4 { margin-bottom:16px; }
@media(max-width:768px) {
    .stock-tabs { gap:4px; }
    .stab { font-size:.75rem; padding:6px 10px; }
}

/* ════════ LANDING PAGE ════════ */
.landing-page { background:var(--bg-primary); min-height:100vh; color:var(--text-primary); }
.landing-nav { position:fixed; top:0; left:0; right:0; z-index:100; background:rgba(10,14,26,0.85); backdrop-filter:blur(16px); border-bottom:1px solid var(--border); }
.landing-nav-inner { max-width:1200px; margin:0 auto; padding:12px 24px; display:flex; align-items:center; justify-content:space-between; }
.landing-logo img { border-radius:6px; }
.landing-links { display:flex; align-items:center; gap:24px; }
.landing-links a { color:var(--text-secondary); text-decoration:none; font-size:.9rem; font-weight:500; transition:color .2s; }
.landing-links a:hover { color:var(--text-primary); }
.landing-menu-btn { display:none; background:none; border:none; color:var(--text-primary); font-size:1.5rem; cursor:pointer; }

.landing-hero { padding:140px 24px 80px; text-align:center; background:radial-gradient(ellipse at 50% 0%, rgba(99,102,241,.15) 0%, transparent 70%); }
.landing-hero-content { max-width:800px; margin:0 auto; }
.landing-hero h1 { font-size:3rem; font-weight:800; line-height:1.2; margin-bottom:16px; }
.gradient-text { background:linear-gradient(135deg, #6366f1, #a78bfa, #22d3ee); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero-sub { font-size:1.15rem; color:var(--text-secondary); line-height:1.7; margin-bottom:32px; }
.hero-actions { display:flex; gap:12px; justify-content:center; margin-bottom:48px; flex-wrap:wrap; }
.hero-stats { display:flex; justify-content:center; gap:48px; flex-wrap:wrap; }
.hero-stat { text-align:center; }
.stat-num { display:block; font-size:2rem; font-weight:800; background:linear-gradient(135deg,#6366f1,#22d3ee); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.stat-label { font-size:.85rem; color:var(--text-secondary); }

.landing-section { max-width:1200px; margin:0 auto; padding:80px 24px; }
.section-title { font-size:2rem; font-weight:700; text-align:center; margin-bottom:8px; }
.section-sub { text-align:center; color:var(--text-secondary); margin-bottom:48px; font-size:1rem; }
.features-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.feature-card { background:var(--bg-card); border:1px solid var(--border); border-radius:16px; padding:32px 24px; text-align:center; transition:transform .2s, box-shadow .2s; }
.feature-card:hover { transform:translateY(-4px); box-shadow:0 8px 30px rgba(99,102,241,.15); border-color:rgba(99,102,241,.3); }
.feature-icon { font-size:2.5rem; margin-bottom:16px; }
.feature-card h3 { font-size:1.1rem; font-weight:600; margin-bottom:8px; }
.feature-card p { font-size:.9rem; color:var(--text-secondary); line-height:1.6; }

.landing-about { background:var(--bg-secondary); border-radius:24px; max-width:900px; }
.about-content { max-width:700px; margin:0 auto; }
.about-content p { color:var(--text-secondary); line-height:1.8; margin-bottom:16px; font-size:1rem; }

.contact-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.contact-card { background:var(--bg-card); border:1px solid var(--border); border-radius:16px; padding:32px 24px; text-align:center; }
.contact-card h3 { font-size:1rem; font-weight:600; margin:8px 0; }
.contact-card p { color:var(--text-secondary); font-size:.9rem; }

.landing-footer { text-align:center; padding:32px 24px; border-top:1px solid var(--border); color:var(--text-secondary); font-size:.85rem; }

.btn-lg { padding:14px 28px; font-size:1rem; }

@media(max-width:768px) {
    .landing-links { display:none; position:absolute; top:60px; left:0; right:0; flex-direction:column; background:var(--bg-secondary); padding:16px; border-bottom:1px solid var(--border); gap:12px; }
    .landing-links.open { display:flex; }
    .landing-menu-btn { display:block; }
    .landing-hero h1 { font-size:2rem; }
    .hero-sub { font-size:1rem; }
    .hero-stats { gap:24px; }
    .stat-num { font-size:1.5rem; }
    .features-grid { grid-template-columns:1fr; }
    .contact-grid { grid-template-columns:1fr; }
    .section-title { font-size:1.5rem; }
}