/* ════════════════════════════════════════════════════════════
   Bilgi Ötesi – app.css  v2.0
   ════════════════════════════════════════════════════════════ */

/* ── CSS Değişkenleri ─────────────────────────────────────── */
:root {
    --sidebar-bg:           #0b1929;
    --sidebar-text:         #8baac4;
    --sidebar-active-bg:    rgba(56,184,242,.15);
    --sidebar-active-text:  #64b5f6;
    --sidebar-brand-color:  #38b8f2;
    --color-accent:         #1565c0;
    --color-accent-light:   #e3f2fd;
    --color-header-grad:    linear-gradient(135deg, #1565c0 0%, #2196f3 100%);
    --color-card-bg:        #ffffff;
    --color-page-bg:        #ecf0f5;
    --color-text-primary:   #1c2b3a;
    --color-text-secondary: #607d8b;
    --color-success:        #388e3c;
    --color-warning:        #f57c00;
    --color-danger:         #c62828;
    --color-border:         #dde3ec;
    --sidebar-width:        200px;
    --topbar-height:        50px;
    --radius:               5px;
    --shadow:               0 2px 8px rgba(0,0,0,.08);
    --transition:           .18s ease;
}

/* ── Dark Tema ────────────────────────────────────────────── */
[data-theme="dark"] {
    --color-accent-light:  #0d2744;
    --color-card-bg:       #132035;
    --color-page-bg:       #0b1929;
    --color-text-primary:  #e2eaf4;
    --color-text-secondary:#7fa0bc;
    --color-border:        #1e3550;
    --color-success:       #43a047;
    --color-warning:       #fb8c00;
    --color-danger:        #e53935;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-page-bg);
    color: var(--color-text-primary);
    font-size: 14px;
    line-height: 1.5;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ──────────────────────────────────────────────── */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: transform var(--transition);
}

.main-wrap {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 16px 14px;
    border-bottom: 1px solid rgba(255,255,255,.06);
}

.brand-icon { font-size: 22px; color: var(--sidebar-brand-color); line-height: 1; }
.brand-name {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    letter-spacing: .02em;
}

.sidebar-section-label {
    padding: 14px 14px 4px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.3);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    color: var(--sidebar-text);
    font-size: 13px;
    transition: background var(--transition), color var(--transition);
    text-decoration: none;
}

.sidebar-link i { font-size: 16px; flex-shrink: 0; opacity: .8; }

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    text-decoration: none;
}

.sidebar-link:hover i, .sidebar-link.active i { opacity: 1; }

.sidebar-link--danger { color: #ef9a9a; }
.sidebar-link--danger:hover { background: rgba(198,40,40,.15); color: #ef9a9a; }

.sidebar-bottom {
    margin-top: auto;
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 6px 0;
}

/* ── Topbar – Mavi Gradient Header ───────────────────────── */
.topbar {
    height: var(--topbar-height);
    background: var(--color-header-grad);
    border-bottom: none;
    box-shadow: 0 2px 10px rgba(21,101,192,.35);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-title {
    font-size: 15px;
    font-weight: 700;
    flex: 1;
    color: #fff;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: .07em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: rgba(255,255,255,.9);
    flex-shrink: 0;
}

.theme-toggle {
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.3);
    border-radius: var(--radius);
    padding: 5px 8px;
    cursor: pointer;
    color: #fff;
    font-size: 15px;
    display: flex;
    align-items: center;
    transition: background var(--transition);
}
.theme-toggle:hover { background: rgba(255,255,255,.25); }

.theme-toggle--fixed {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 200;
    background: var(--color-accent);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 3px 10px rgba(0,0,0,.3);
}

/* ── User Badge ──────────────────────────────────────────── */
.user-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
}

.user-name { font-weight: 600; color: #fff; }

/* ── Content ─────────────────────────────────────────────── */
.content { padding: 18px; flex: 1; }

/* ── Card ────────────────────────────────────────────────── */
.card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    gap: 10px;
    flex-wrap: wrap;
}

.card__header h3 {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.card__body { padding: 16px; }
.card__body.p-0 { padding: 0; }

/* ── Stat Grid ───────────────────────────────────────────── */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.stat-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: 14px;
    gap: 12px;
    position: relative;
}

.stat-card__icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.stat-card__value { font-size: 22px; font-weight: 700; }
.stat-card__label { font-size: 11px; color: var(--color-text-secondary); }

.stat-card__bar {
    position: absolute;
    bottom: 0; left: 0;
    height: 3px;
    transition: width .4s ease;
}

/* ── Table ───────────────────────────────────────────────── */
.table { width: 100%; border-collapse: collapse; }

.table th {
    background: var(--sidebar-bg);
    color: #fff;
    padding: 9px 12px;
    text-align: left;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    white-space: nowrap;
}

.table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { filter: brightness(.97); }

/* ── Konu Tablo Satır Renkleri ───────────────────────────── */
tr[data-durum="yapilmadi"] td { background: #fff0f0; }
tr[data-durum="yarim"] td     { background: #fffde7; }
tr[data-durum="yapildi"] td   { background: #f1f8e9; }

.table-responsive { overflow-x: auto; }

/* ── Badge ───────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}

.badge--success  { background: #e8f5e9; color: #2e7d32; }
.badge--warning  { background: #fff3e0; color: #e65100; }
.badge--danger   { background: #ffebee; color: #c62828; }
.badge--info     { background: #e3f2fd; color: #1565c0; }
.badge--student  { background: #e3f2fd; color: #1565c0; }
.badge--teacher  { background: #fff3e0; color: #e65100; }
.badge--admin    { background: #ede7f6; color: #512da8; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 14px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: filter var(--transition), background var(--transition);
}

.btn:hover { filter: brightness(.92); text-decoration: none; }
.btn--primary   { background: var(--color-accent); color: #fff; }
.btn--secondary { background: transparent; border-color: var(--color-border); color: var(--color-text-primary); }
.btn--success   { background: var(--color-success); color: #fff; }
.btn--warning   { background: var(--color-warning); color: #fff; }
.btn--danger    { background: var(--color-danger); color: #fff; }
.btn--dark      { background: var(--sidebar-bg); color: #fff; }
.btn--sm        { padding: 4px 10px; font-size: 12px; }
.btn--full      { width: 100%; justify-content: center; }

/* ── Forms ───────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group--grow { flex: 1; }
.form-group--action { justify-content: flex-end; padding-top: 16px; }

.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-start;
}

.form-control {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-card-bg);
    color: var(--color-text-primary);
    font-size: 13px;
    transition: border-color var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(21,101,192,.12);
}

.form-control--sm { padding: 4px 8px; font-size: 12px; width: auto; }

label { font-size: 12px; font-weight: 600; color: var(--color-text-secondary); }

/* ── Input with icon ─────────────────────────────────────── */
.input-icon { position: relative; }
.input-icon i {
    position: absolute;
    left: 10px; top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    font-size: 15px;
    pointer-events: none;
}
.input-icon input { padding-left: 33px; }

/* ── Alert ───────────────────────────────────────────────── */
.alert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 16px;
    margin: 0 18px 14px;
    border-radius: var(--radius);
    font-size: 13px;
}

.alert--success { background: #f1f8e9; border: 1px solid #c5e1a5; color: #2e7d32; }
.alert--danger  { background: #ffebee; border: 1px solid #ef9a9a; color: #c62828; }
.alert--info    { background: #e3f2fd; border: 1px solid #90caf9; color: #1565c0; }
.alert--warning { background: #fff3e0; border: 1px solid #ffcc80; color: #e65100; }
.alert-close    { margin-left: auto; background: none; border: none; cursor: pointer; font-size: 16px; color: inherit; }

/* ── Grid ────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.flex-col { display: flex; flex-direction: column; }
.gap-20 { gap: 20px; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }

/* ── Konu Sayfası 2-Kolon Layout ─────────────────────────── */
.konu-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 18px;
    align-items: start;
}

.konu-soru-info {
    display: block;
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* ── İlerleme Halkası (CSS donut) ────────────────────────── */
.progress-ring-wrap { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 16px 0; }

.progress-ring {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background: conic-gradient(
        #4caf50 0deg calc(var(--pct, 0) * 3.6deg),
        #ffcdd2 calc(var(--pct, 0) * 3.6deg) 360deg
    );
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}

.progress-ring::before {
    content: '';
    width: 90px;
    height: 90px;
    background: var(--color-card-bg);
    border-radius: 50%;
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%,-50%);
}

.progress-ring__label {
    position: relative;
    z-index: 1;
    text-align: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1.3;
}
.progress-ring__label small { font-size: 10px; font-weight: 400; color: var(--color-text-secondary); }

.progress-pct-text {
    font-weight: 700;
    color: var(--color-accent);
    font-size: 13px;
    text-align: center;
}

/* ── Auth Sayfaları ──────────────────────────────────────── */
.auth-body {
    background: var(--sidebar-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.auth-card {
    background: var(--color-card-bg);
    border-radius: 10px;
    padding: 36px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,.4);
}

.auth-brand { text-align: center; margin-bottom: 28px; }
.auth-brand h1 { font-size: 21px; margin-top: 8px; }
.auth-brand p { font-size: 13px; color: var(--color-text-secondary); }
.auth-brand-icon { font-size: 38px; color: var(--sidebar-brand-color); }

.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-links { margin-top: 14px; text-align: center; font-size: 13px; }

/* ── Progress Bar ────────────────────────────────────────── */
.progress-bar {
    background: var(--color-border);
    border-radius: 20px;
    height: 6px;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.progress-bar__fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: 20px;
    transition: width .4s ease;
}

/* ── Konu Durum Select ───────────────────────────────────── */
.durum-select { min-width: 110px; }

/* ── Eski buton desteği (geriye dönük) ───────────────────── */
.durum-group { display: flex; gap: 4px; flex-wrap: wrap; }
.durum-btn {
    padding: 3px 9px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
    background: var(--color-card-bg);
    color: var(--color-text-secondary);
    transition: all var(--transition);
}
.durum-btn--yapilmadi.active { background: #ffebee; color: #c62828; border-color: #ef9a9a; }
.durum-btn--yarim.active     { background: #fff3e0; color: #e65100; border-color: #ffcc80; }
.durum-btn--yapildi.active   { background: #e8f5e9; color: #2e7d32; border-color: #a5d6a7; }

/* ── Ödev Haftalık Grid ──────────────────────────────────── */
.week-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    margin-top: 4px;
}

/* Varsayılan gün başlığı rengi */
.week-day__header {
    background: #455a64;
    color: #fff;
    text-align: center;
    padding: 9px 6px;
    border-radius: var(--radius) var(--radius) 0 0;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}

/* Gün bazlı renkler */
.week-day[data-gun="1"] .week-day__header { background: #1a1a2e; }
.week-day[data-gun="2"] .week-day__header { background: #00695c; }
.week-day[data-gun="3"] .week-day__header { background: #33691e; }
.week-day[data-gun="4"] .week-day__header { background: #4a148c; }
.week-day[data-gun="5"] .week-day__header { background: #bf360c; }
.week-day[data-gun="6"] .week-day__header { background: #01579b; }
.week-day[data-gun="7"] .week-day__header { background: #b71c1c; }

.week-day__body {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    min-height: 90px;
    padding: 7px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.odev-card {
    background: var(--color-accent-light);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 7px;
}

.odev-card--done { background: #f1f8e9; border-color: #c5e1a5; }
.odev-card--pending { background: #fff8e1; border-color: #ffe082; }

.odev-card__ders { font-weight: 700; font-size: 11px; color: var(--color-text-primary); }
.odev-card__not  { font-size: 10px; color: var(--color-text-secondary); margin-top: 1px; }
.odev-card__atayan { font-size: 10px; color: var(--color-text-secondary); margin-top: 2px; }
.odev-card__actions { display: flex; gap: 3px; margin-top: 5px; flex-wrap: wrap; }

.empty-state-sm {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 11px;
    padding: 10px 0;
}

/* ── Sınav Net ───────────────────────────────────────────── */
.score-big { font-size: 32px; font-weight: 700; color: var(--color-accent); margin: 6px 0; }
.score-big small { font-size: 15px; color: var(--color-text-secondary); }

.score-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.score-item { text-align: center; }
.score-item__label { font-size: 11px; color: var(--color-text-secondary); }
.score-item__value { font-size: 20px; font-weight: 700; color: var(--color-accent); }

.net-label { font-weight: 600; color: var(--color-accent); }

/* ── Pagination ──────────────────────────────────────────── */
.pagination {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
    flex-wrap: wrap;
}

.pagination__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px; height: 30px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 12px;
    color: var(--color-text-primary);
    text-decoration: none;
}

.pagination__item.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* ── Misc ────────────────────────────────────────────────── */
.empty-state { text-align: center; color: var(--color-text-secondary); padding: 28px 20px; }
.text-muted   { color: var(--color-text-secondary); }
.action-cell  { white-space: nowrap; }
.ders-nav     { display: flex; flex-wrap: wrap; gap: 4px; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1100px) {
    .konu-layout { grid-template-columns: 1fr; }
}

@media (max-width: 1024px) {
    .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
    .week-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-wrap { margin-left: 0; }
    .hamburger { display: flex; }
    .week-grid { grid-template-columns: 1fr 1fr; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .week-grid { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr; }
    .content { padding: 12px; }
}