/* Cursor Akademi — modern, gece/gündüz, mobil-first tasarım */
:root {
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --bg-elev-2: #f0f2f7;
  --text: #1a1d29;
  --text-soft: #5a6072;
  --text-muted: #8a93a6;
  --border: #e3e6ee;
  --border-strong: #cfd4e1;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-soft: #eef2ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px rgba(15, 18, 30, 0.06);
  --shadow-md: 0 4px 14px rgba(15, 18, 30, 0.08);
  --shadow-lg: 0 18px 40px rgba(15, 18, 30, 0.12);
  --radius: 14px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
  --sidebar-w: 260px;
}

[data-theme="dark"] {
  --bg: #0b0d14;
  --bg-elev: #141826;
  --bg-elev-2: #1c2236;
  --text: #e6e9f2;
  --text-soft: #a7adc0;
  --text-muted: #6c7591;
  --border: #2a3045;
  --border-strong: #3a4263;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-soft: #1e213b;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 40px rgba(0, 0, 0, 0.55);
}

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

.icon { display: inline-block; vertical-align: -3px; flex-shrink: 0; color: currentColor; }
.icon-inline { vertical-align: -2px; margin-right: 6px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
  transition: background 0.22s ease, color 0.22s ease;
  -webkit-text-size-adjust: 100%;
}

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

/* ====== Layout ====== */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  padding: 22px 18px;
  display: flex; flex-direction: column; gap: 6px;
  position: sticky; top: 0; height: 100vh;
  z-index: 50;
  flex-shrink: 0;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 8px 18px; margin-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #ec4899);
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 18px;
  flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-text strong { font-size: 15px; }
.brand-text span { font-size: 11px; color: var(--text-muted); }

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 12px; border-radius: var(--radius-sm);
  color: var(--text-soft); font-weight: 500;
  cursor: pointer; user-select: none;
  min-height: 44px;
}
.nav-item:hover { background: var(--bg-elev-2); color: var(--text); text-decoration: none; }
.nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-item .ico { width: 18px; text-align: center; display: inline-flex; }

.sidebar-bottom { margin-top: auto; display: flex; flex-direction: column; gap: 8px; }
.theme-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 12px; border-radius: var(--radius-sm);
  background: var(--bg-elev-2); border: 1px solid var(--border);
  cursor: pointer; font-weight: 500; color: var(--text-soft);
  min-height: 44px;
}
.theme-toggle:hover { color: var(--text); }

.sidebar-user {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px; font-size: 12px; color: var(--text-muted);
}
.sidebar-user .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; font-weight: 700; font-size: 12px;
  overflow: hidden; flex-shrink: 0;
}
.sidebar-user .avatar img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-user .who { display: flex; flex-direction: column; min-width: 0; }
.sidebar-user .who strong { color: var(--text-soft); font-size: 12px; }

/* Hamburger / mobil topbar */
.mobile-topbar {
  display: none;
  position: sticky; top: 0; z-index: 40;
  background: var(--bg-elev); border-bottom: 1px solid var(--border);
  padding: 10px 14px;
  align-items: center; gap: 12px;
}
.hamburger {
  width: 44px; height: 44px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text-soft);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.hamburger:hover { color: var(--text); }
.mobile-topbar .brand-mark { width: 32px; height: 32px; font-size: 14px; }
.mobile-topbar .title { font-weight: 600; font-size: 14px; flex: 1; min-width: 0; }
.mobile-topbar .mt-action { width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-soft); cursor: pointer; }

.sidebar-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 49;
}
.sidebar-backdrop.show { display: block; }

.main { flex: 1; padding: 28px 36px 60px; max-width: 1280px; min-width: 0; }

/* ====== Generic ====== */
.page-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.page-header h1 { margin: 0; font-size: 26px; font-weight: 700; letter-spacing: -0.01em; }
.page-header p { margin: 4px 0 0; color: var(--text-soft); }

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.card h2, .card h3 { margin: 0 0 14px; }
.card-title { font-size: 13px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; display: inline-flex; align-items: center; gap: 6px; }
.stat-num { font-size: 30px; font-weight: 700; margin-top: 6px; }
.stat-sub { color: var(--text-muted); font-size: 12px; margin-top: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff; border: none;
  font-weight: 600; cursor: pointer; transition: all 0.15s ease;
  font-size: 14px; min-height: 44px;
}
.btn:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn.ghost { background: transparent; color: var(--text-soft); border: 1px solid var(--border-strong); }
.btn.ghost:hover { background: var(--bg-elev-2); color: var(--text); }
.btn.success { background: var(--success); }
.btn.danger { background: var(--danger); }
.btn.warn { background: var(--warning); }
.btn.sm { padding: 7px 12px; font-size: 13px; min-height: 36px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.input, .textarea, .select {
  width: 100%; padding: 11px 14px;
  background: var(--bg-elev-2); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font: inherit; outline: none; transition: border 0.15s;
  min-height: 44px;
}
.input:focus, .textarea:focus, .select:focus { border-color: var(--accent); }
.textarea { min-height: 90px; resize: vertical; }
.label { display: block; font-size: 13px; font-weight: 600; color: var(--text-soft); margin-bottom: 6px; }

.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent);
}
.badge.success { background: rgba(16, 185, 129, 0.12); color: var(--success); }
.badge.warn { background: rgba(245, 158, 11, 0.12); color: var(--warning); }
.badge.danger { background: rgba(239, 68, 68, 0.12); color: var(--danger); }
.badge.muted { background: var(--bg-elev-2); color: var(--text-muted); }

/* ====== Login ====== */
.login-wrap {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 48px 24px; background: var(--bg);
  position: relative;
}
.login-topbar {
  position: absolute; top: 20px; right: 24px;
  display: flex; align-items: center; gap: 8px;
}
.login-icon-btn {
  width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--border); border-radius: 8px;
  color: var(--text-soft); cursor: pointer; transition: all 0.15s;
}
.login-icon-btn:hover { color: var(--text); border-color: var(--border-strong); }

.login-brand {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  margin-bottom: 32px;
}
.login-brand .mark {
  position: relative;
  width: 84px; height: 84px; border-radius: 22px;
  background: #ffffff;
  display: grid; place-items: center;
  overflow: hidden;
  transition: transform .25s ease;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.6) inset,
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 12px 32px -8px rgba(249, 115, 22, 0.35),
    0 6px 18px -4px rgba(15, 23, 42, 0.25);
}
.login-brand .mark img {
  width: 88%; height: 88%; object-fit: contain;
  display: block;
  transition: transform 0.25s ease;
}
.login-brand .mark::after {
  content: ""; position: absolute; inset: 0; border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.45) 0%, transparent 55%);
  pointer-events: none;
}
.login-brand .mark:hover { transform: translateY(-2px) rotate(-2deg); }
.login-brand .name-wrap {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  text-align: center; max-width: 420px;
}
.login-brand .name {
  font-size: 26px; font-weight: 800; letter-spacing: -0.03em;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 50%, #c2410c 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}
.login-brand .tagline {
  font-size: 13px; font-weight: 500; letter-spacing: 0.005em;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 2px;
  white-space: nowrap;
}
.login-footer {
  margin-top: 22px;
  font-size: 11px; font-weight: 500; letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  text-align: center;
  opacity: 0.65;
}
.login-footer strong {
  font-weight: 700; color: var(--text);
  letter-spacing: 0.05em;
  opacity: 0.9;
}
@media (max-width: 480px) {
  .login-brand .tagline { white-space: normal; max-width: 320px; line-height: 1.5; }
}

.login-card {
  width: 100%; max-width: 380px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  box-shadow: var(--shadow-md);
}
.login-card h1 {
  margin: 0 0 4px; font-size: 22px; font-weight: 600;
  letter-spacing: -0.02em; text-align: center;
}
.login-card p.sub {
  margin: 0 0 24px; color: var(--text-muted);
  font-size: 13px; text-align: center;
}
.login-card .field { margin-bottom: 14px; }
.login-card .label {
  font-size: 12px; font-weight: 500; color: var(--text-soft);
  margin-bottom: 6px; letter-spacing: 0;
}
.login-card .input {
  background: var(--bg-elev-2); border: 1px solid var(--border);
  padding: 12px 14px; font-size: 14px;
}
.login-card .input:focus { border-color: var(--text-soft); background: var(--bg); }
.login-card .btn {
  width: 100%; padding: 12px; margin-top: 8px;
  background: var(--text); color: var(--bg);
  font-weight: 600; font-size: 14px;
  border-radius: var(--radius-sm);
}
.login-card .btn:hover { background: var(--text-soft); transform: none; box-shadow: none; }

/* ====== Lesson ====== */
.topic-list { display: flex; flex-direction: column; gap: 10px; }
.topic {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--bg-elev-2); border: 1px solid transparent;
  transition: border 0.15s;
  position: relative;
}
.topic:hover { border-color: var(--border); }
.topic.done { opacity: 0.65; }
.topic.stale { border-color: var(--warning); }
.topic .check {
  width: 28px; height: 28px; border-radius: 6px; border: 2px solid var(--border-strong);
  display: grid; place-items: center; cursor: pointer; flex-shrink: 0; margin-top: 2px;
  transition: all 0.15s;
}
.topic.done .check { background: var(--success); border-color: var(--success); color: #fff; }
.topic .body { flex: 1; min-width: 0; }
.topic .title { font-weight: 600; margin-bottom: 4px; word-wrap: break-word; }
.topic .meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.topic .stale-badge { color: var(--warning); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.topic .content { margin-top: 8px; color: var(--text-soft); font-size: 14px; word-wrap: break-word; }
.topic .content code { background: var(--bg-elev); padding: 1px 6px; border-radius: 4px; font-size: 12.5px; font-family: "JetBrains Mono", Consolas, monospace; }
.topic .content strong { color: var(--text); }
.topic .content ul, .topic .content ol { padding-left: 22px; margin: 6px 0; }
.topic pre.cmd, .topic pre.prompt {
  margin: 8px 0 0; padding: 10px 12px; border-radius: 8px;
  background: var(--bg); border: 1px solid var(--border);
  font-family: "JetBrains Mono", "Consolas", "Courier New", monospace;
  font-size: 12.5px; overflow-x: auto; white-space: pre-wrap; word-wrap: break-word;
}
.topic pre.prompt { border-left: 3px solid var(--accent); }
.topic .links { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.topic .links a {
  padding: 4px 10px; border-radius: 6px;
  background: var(--accent-soft); color: var(--accent); font-size: 12px;
}

.timeblocks { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.timeblock {
  padding: 5px 11px; border-radius: 999px;
  background: var(--bg-elev-2); border: 1px solid var(--border);
  font-size: 12px; font-weight: 500;
}

.homework-card {
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border: 1px dashed var(--accent);
  border-radius: var(--radius);
  padding: 22px;
}
.homework-card h2 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.locked-card {
  background: var(--bg-elev);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-muted);
}
.locked-card .lock-ico {
  width: 56px; height: 56px; margin: 0 auto 14px;
  display: grid; place-items: center;
  border-radius: 14px; background: var(--bg-elev-2);
  color: var(--text-soft);
}
.locked-card h3 { color: var(--text); margin: 0 0 6px; font-size: 17px; }
.locked-card p { margin: 0 0 16px; font-size: 13px; }
.locked-card .progress-bar { max-width: 320px; margin: 0 auto; }
.locked-card .progress-text { margin-top: 8px; font-size: 12px; color: var(--text-muted); }

.feedback-block {
  margin-top: 14px; padding: 14px 16px;
  background: var(--accent-soft); border-radius: 10px;
  border-left: 3px solid var(--accent);
}
.feedback-block strong { color: var(--accent); font-size: 13px; display: block; margin-bottom: 4px; }
.feedback-block .body { color: var(--text); font-size: 14px; line-height: 1.6; word-wrap: break-word; }

.submission-block {
  margin-top: 18px; padding: 16px;
  border-top: 1px solid var(--border);
}
.submission-block .head {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; margin-bottom: 8px;
}
.submission-block .note { color: var(--text-soft); font-size: 14px; margin: 6px 0; word-wrap: break-word; }

.status-pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
}
.status-pill.pending { background: rgba(245,158,11,0.12); color: var(--warning); }
.status-pill.approved { background: rgba(16,185,129,0.12); color: var(--success); }
.status-pill.needs_revision { background: rgba(239,68,68,0.12); color: var(--danger); }

.success-banner {
  margin-top: 14px; padding: 14px 16px;
  background: rgba(16,185,129,0.10); border: 1px solid rgba(16,185,129,0.25);
  border-radius: 10px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  color: var(--success); font-weight: 500; font-size: 14px;
}
.success-banner .btn { margin-left: auto; }

.upload-area {
  margin-top: 12px; padding: 22px; border: 2px dashed var(--border-strong);
  border-radius: var(--radius); text-align: center; color: var(--text-muted);
  cursor: pointer;
}
.upload-area:hover { border-color: var(--accent); color: var(--accent); }

.file-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 11px; margin: 4px 4px 0 0;
  border-radius: 8px; background: var(--bg-elev-2); font-size: 12px;
  word-break: break-all;
}
.file-chip.warn { background: rgba(245,158,11,0.12); color: var(--warning); }
.file-chip.danger { background: rgba(239,68,68,0.12); color: var(--danger); }

.progress-bar {
  height: 8px; border-radius: 999px; background: var(--bg-elev-2); overflow: hidden;
}
.progress-bar > div {
  height: 100%; background: linear-gradient(90deg, var(--accent), #ec4899);
  border-radius: 999px;
  transition: width 0.4s ease;
}

/* Streak göstergesi */
.streak-card { background: linear-gradient(135deg, rgba(245,158,11,0.10), transparent); border: 1px solid rgba(245,158,11,0.25); }
.streak-num { color: var(--warning); font-size: 30px; font-weight: 700; display: inline-flex; align-items: center; gap: 6px; }

/* Reset ve küçük butonlar */
.reset-link {
  background: transparent; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 12px;
  padding: 4px 8px; border-radius: 4px;
  text-decoration: underline; text-decoration-style: dotted;
}
.reset-link:hover { color: var(--danger); }

/* ====== Tablo ====== */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.table tbody tr:hover { background: var(--bg-elev-2); }

/* Mobil tablo - kart liste */
.cardlist { display: flex; flex-direction: column; gap: 8px; }
.cardlist .row {
  display: grid; grid-template-columns: 1fr auto; gap: 10px;
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-elev-2);
  align-items: center;
}
.cardlist .row .meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ====== Toast ====== */
.toast-wrap { position: fixed; bottom: 24px; right: 24px; left: 24px; display: flex; flex-direction: column; gap: 10px; z-index: 1000; pointer-events: none; align-items: flex-end; }
.toast {
  background: var(--bg-elev); border: 1px solid var(--border);
  padding: 12px 16px; border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md); min-width: 220px; max-width: 380px;
  display: flex; align-items: center; gap: 10px;
  animation: slideIn 0.25s ease;
  font-size: 14px;
  pointer-events: auto;
}
.toast .toast-ico { display: inline-flex; }
.toast.success { border-left: 3px solid var(--success); }
.toast.success .toast-ico { color: var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.error .toast-ico { color: var(--danger); }
.toast.info { border-left: 3px solid var(--accent); }
.toast.info .toast-ico { color: var(--accent); }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ====== Modal ====== */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: grid; place-items: center;
  z-index: 100; padding: 16px;
  animation: fadeIn 0.2s;
}
.modal {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  max-width: 480px; width: 100%;
  box-shadow: var(--shadow-lg);
  max-height: 90vh; overflow-y: auto;
}
.modal h2 { margin: 0 0 8px; font-size: 18px; }
.modal p { color: var(--text-soft); margin: 0 0 14px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; margin-top: 14px; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ====== Misc ====== */
.empty {
  padding: 36px; text-align: center; color: var(--text-muted);
  border: 1px dashed var(--border); border-radius: var(--radius);
}

.split { display: flex; gap: 18px; flex-wrap: wrap; }
.split > * { flex: 1; min-width: 280px; }

.day-pill {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 10px; border-radius: var(--radius-sm);
  background: var(--bg-elev-2); border: 1px solid var(--border);
  min-width: 60px; cursor: pointer; transition: all 0.15s;
  flex-shrink: 0;
}
.day-pill:hover { border-color: var(--accent); }
.day-pill.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.day-pill strong { font-size: 18px; }
.day-pill span { font-size: 11px; opacity: 0.85; }

.weeks-list { display: flex; flex-direction: column; gap: 8px; }
.week-row {
  display: flex; gap: 12px; align-items: center;
  padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--bg-elev-2); border: 1px solid transparent;
  cursor: pointer; transition: border 0.15s;
}
.week-row:hover { border-color: var(--border); }
.week-num {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; font-weight: 700; flex-shrink: 0;
}
.week-row.current .week-num { background: var(--accent); color: #fff; }
.week-info { flex: 1; min-width: 0; }
.week-info strong { display: block; word-wrap: break-word; }
.week-info small { color: var(--text-muted); display: block; margin-top: 2px; word-wrap: break-word; }

/* Avatar (büyük profil) */
.profile-avatar {
  width: 96px; height: 96px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; font-weight: 700; font-size: 36px;
  overflow: hidden; flex-shrink: 0;
}
.profile-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ====================================================================
   MOBİL UYUM (768px ve altı)
   ==================================================================== */
@media (max-width: 880px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }

  .mobile-topbar { display: flex; }

  .sidebar {
    position: fixed; left: 0; top: 0;
    height: 100vh; width: 280px;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }

  .main { padding: 16px 14px 60px; }
  .page-header { gap: 10px; margin-bottom: 14px; }
  .page-header h1 { font-size: 22px; }

  .toast-wrap { bottom: 14px; right: 14px; left: 14px; }
}

@media (max-width: 600px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .grid.cols-2.always-2, .grid.cols-4.always-2 { grid-template-columns: repeat(2, 1fr); }

  .card { padding: 16px; border-radius: 12px; }
  .stat-num { font-size: 24px; }

  .topic { padding: 12px; gap: 10px; }
  .topic .check { width: 26px; height: 26px; }

  .table { display: none; }

  .week-tabs-scroll, .day-tabs-scroll {
    display: flex; flex-wrap: nowrap;
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding-bottom: 6px;
  }

  .login-wrap { padding: 24px 16px; }
  .login-brand { margin-bottom: 24px; }

  .upload-area { padding: 18px; }
  .file-chip { font-size: 11px; padding: 5px 9px; }

  .modal { padding: 18px; border-radius: 12px; }
}

/* Print mode (PDF için) */
@media print {
  .sidebar, .mobile-topbar, .sidebar-backdrop, .toast-wrap, .modal-backdrop { display: none !important; }
  body { background: white; color: black; }
  .main { padding: 0; max-width: 100%; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}