* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, "Segoe UI", Roboto, sans-serif; background: #0f1115; color: #e8ecf1; }
a { color: #6ea8fe; }
button { cursor: pointer; }

/* ─── Login ─── */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: #1a1e27; padding: 32px; border-radius: 12px; width: 340px; display: flex; flex-direction: column; gap: 14px; box-shadow: 0 8px 28px rgba(0,0,0,.4); }
.login-card h1 { margin: 0 0 8px; font-size: 22px; text-align: center; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: #9aa5b5; }
.login-card input { background: #0f1115; border: 1px solid #2a3140; color: #e8ecf1; padding: 10px 12px; border-radius: 8px; font-size: 15px; }
.login-card input:focus { outline: none; border-color: #6ea8fe; }
.login-card button { background: #6ea8fe; color: #0f1115; border: 0; padding: 10px; border-radius: 8px; font-size: 15px; font-weight: 600; }
.err { color: #ff6b6b; font-size: 13px; min-height: 18px; }

/* ─── Top bar ─── */
.topbar { display: flex; align-items: center; gap: 24px; padding: 12px 24px; background: #1a1e27; border-bottom: 1px solid #242a36; }
.brand { font-weight: 700; font-size: 16px; }
.tabs { display: flex; gap: 4px; flex: 1; }
.tab { background: transparent; color: #9aa5b5; border: 0; padding: 8px 14px; border-radius: 6px; font-size: 14px; }
.tab:hover { color: #e8ecf1; background: #242a36; }
.tab.active { color: #e8ecf1; background: #242a36; }
.user { display: flex; align-items: center; gap: 12px; font-size: 13px; color: #9aa5b5; }
.link { background: transparent; color: #6ea8fe; border: 0; padding: 4px 8px; font-size: 13px; }

/* ─── Panels ─── */
main { padding: 24px; max-width: 1100px; margin: 0 auto; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 16px; flex-wrap: wrap; }
.panel-head h2 { margin: 0; font-size: 18px; }
.meta { font-size: 12px; color: #9aa5b5; }

/* ─── Exercises ─── */
.exercises { display: flex; flex-direction: column; gap: 12px; }
.exercise { background: #1a1e27; border: 1px solid #242a36; border-radius: 10px; padding: 14px 16px; }
.exercise-head { display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
.exercise-head h3 { margin: 0; font-size: 15px; }
.exercise-head .counter-type { font-size: 12px; color: #9aa5b5; font-family: monospace; }
.exercise-body { margin-top: 12px; display: none; }
.exercise.open .exercise-body { display: block; }
.params-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px 14px; margin-bottom: 12px; }
.param { display: flex; flex-direction: column; gap: 4px; }
.param label { font-size: 12px; color: #9aa5b5; font-family: monospace; }
.param input { background: #0f1115; border: 1px solid #2a3140; color: #e8ecf1; padding: 6px 8px; border-radius: 6px; font-size: 14px; font-family: monospace; }
.param input:focus { outline: none; border-color: #6ea8fe; }
.angle-source { font-size: 12px; color: #9aa5b5; font-family: monospace; background: #0f1115; padding: 8px 10px; border-radius: 6px; margin-bottom: 10px; }
.exercise-actions { display: flex; gap: 8px; }
.btn { background: #242a36; color: #e8ecf1; border: 1px solid #2a3140; padding: 8px 14px; border-radius: 6px; font-size: 13px; }
.btn:hover { background: #2d3444; }
.btn.primary { background: #6ea8fe; color: #0f1115; border-color: #6ea8fe; font-weight: 600; }
.btn.primary:hover { background: #8cbcff; }
.btn.danger { color: #ff6b6b; }

/* ─── Exercise cards grid ─── */
.exercises-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.ex-card { position: relative; background: #1a1e27; border: 1px solid #242a36; border-radius: 10px; padding: 16px 18px; text-decoration: none; color: #e8ecf1; display: flex; flex-direction: column; gap: 6px; transition: .15s; }
.ex-card:hover { background: #222836; border-color: #6ea8fe; transform: translateY(-1px); }
.ex-card-name { font-size: 15px; font-weight: 600; }
.ex-card-mode { font-size: 11px; color: #9aa5b5; font-family: monospace; }
.ex-card-counter { font-size: 12px; color: #9aa5b5; margin-top: 4px; }
.ex-card-arrow { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 20px; color: #6ea8fe; opacity: .6; }

/* ─── Exercise detail ─── */
.detail-head { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.detail-title h2 { margin: 0 0 4px; font-size: 20px; }
.detail-layout { display: grid; grid-template-columns: minmax(400px, 620px) 1fr; gap: 24px; align-items: start; }
@media (max-width: 900px) { .detail-layout { grid-template-columns: 1fr; } }

.canvas-wrap { background: #1a1e27; border: 1px solid #242a36; border-radius: 10px; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.canvas-wrap canvas { width: 100%; height: auto; border-radius: 6px; background: #0f1115; }
.canvas-controls { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.slider-inline { display: flex; align-items: center; gap: 8px; font-size: 12px; color: #9aa5b5; flex: 1; min-width: 140px; }
.slider-inline input[type=range] { flex: 1; }
.angle-readout { display: flex; gap: 14px; font-size: 13px; color: #9aa5b5; }
.angle-readout b { color: #ffd24a; font-family: monospace; }

.params-panel { background: #1a1e27; border: 1px solid #242a36; border-radius: 10px; padding: 16px 18px; }
.params-panel h3 { margin: 0 0 14px; font-size: 15px; }
.params-list { display: flex; flex-direction: column; gap: 14px; }
.param-row { display: flex; flex-direction: column; gap: 6px; }
.param-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.param-head label { font-size: 13px; color: #e8ecf1; font-weight: 500; }
.param-head .unit { color: #9aa5b5; font-size: 11px; font-weight: 400; margin-left: 4px; }
.param-head input[type=number] { background: #0f1115; border: 1px solid #2a3140; color: #e8ecf1; padding: 4px 8px; border-radius: 5px; font-size: 13px; font-family: monospace; width: 80px; text-align: right; }
.param-row input[type=range] { width: 100%; accent-color: #6ea8fe; }
.param-hint { font-size: 11px; color: #9aa5b5; line-height: 1.4; }
.save-row { display: flex; gap: 8px; margin-top: 18px; padding-top: 14px; border-top: 1px solid #242a36; }

/* ─── Videos ─── */
.upload-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.upload-form select, .upload-form input[type=file] { background: #0f1115; border: 1px solid #2a3140; color: #e8ecf1; padding: 6px 10px; border-radius: 6px; font-size: 13px; }
.upload-form button { background: #6ea8fe; color: #0f1115; border: 0; padding: 8px 14px; border-radius: 6px; font-weight: 600; }
.videos { display: flex; flex-direction: column; gap: 10px; }
.video { background: #1a1e27; border: 1px solid #242a36; border-radius: 8px; padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; }
.video-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.video-name { font-weight: 600; font-size: 14px; }
.video-meta { font-size: 12px; color: #9aa5b5; font-family: monospace; }
.video-actions { display: flex; gap: 6px; }
.status { font-size: 11px; padding: 2px 8px; border-radius: 10px; font-family: monospace; }
.status.uploaded { background: #2a3140; color: #9aa5b5; }
.status.queued { background: #3a3418; color: #ffd24a; }
.status.analyzed { background: #1e3a1e; color: #6cd46c; }
.status.error, .status.analyzer_unavailable { background: #3a1e1e; color: #ff6b6b; }
.report { background: #0f1115; padding: 10px 12px; border-radius: 6px; font-size: 12px; font-family: monospace; color: #9aa5b5; white-space: pre-wrap; max-height: 200px; overflow-y: auto; }

/* ─── Toast ─── */
.toast { position: fixed; bottom: 24px; right: 24px; background: #242a36; color: #e8ecf1; padding: 10px 16px; border-radius: 8px; font-size: 13px; box-shadow: 0 4px 20px rgba(0,0,0,.4); opacity: 0; transform: translateY(10px); transition: .2s; pointer-events: none; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: #3a1e1e; color: #ff6b6b; }
.toast.ok { background: #1e3a1e; color: #6cd46c; }