@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300&family=Sora:wght@300;400;500;600&display=swap');

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

:root {
  --c-bg:        #0d0f0e;
  --c-surface:   #131614;
  --c-card:      #181b19;
  --c-border:    rgba(255,255,255,0.07);
  --c-border2:   rgba(255,255,255,0.13);

  --c-text:      #e8e4dc;
  --c-text2:     #8a8f8b;
  --c-text3:     #4a4f4b;

  --c-green:     #5adf8a;
  --c-green-dim: #1a3323;
  --c-amber:     #f0a832;
  --c-amber-dim: #2d2010;
  --c-blue:      #4db8ff;
  --c-blue-dim:  #0d2030;
  --c-red:       #f06060;
  --c-red-dim:   #2d1010;
  --c-purple:    #b090ff;
  --c-purple-dim:#1e1530;
  --c-coral:     #ff7f60;
  --c-coral-dim: #2d1810;

  --radius:  8px;
  --radius-lg: 14px;
  --font-display: 'Sora', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --anim: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--c-surface);
  border-right: 0.5px solid var(--c-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  padding: 24px 0 16px;
  transition: transform var(--anim);
}

.sidebar-logo {
  padding: 0 20px 24px;
  border-bottom: 0.5px solid var(--c-border);
  margin-bottom: 16px;
}
.sidebar-logo .eyebrow {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .15em;
  color: var(--c-text3);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.sidebar-logo .title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.2;
}
.sidebar-logo .accent { color: var(--c-green); }

.nav-section-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .15em;
  color: var(--c-text3);
  text-transform: uppercase;
  padding: 0 20px;
  margin: 12px 0 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  cursor: pointer;
  color: var(--c-text2);
  font-size: 13px;
  font-weight: 400;
  transition: all var(--anim);
  border-left: 2px solid transparent;
  user-select: none;
}
.nav-item:hover { color: var(--c-text); background: rgba(255,255,255,0.03); }
.nav-item.active {
  color: var(--c-green);
  border-left-color: var(--c-green);
  background: rgba(90,223,138,0.05);
}
.nav-item .nav-icon {
  width: 16px;
  font-size: 14px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  margin-top: auto;
  padding: 16px 20px 0;
  border-top: 0.5px solid var(--c-border);
}
.phase-indicator {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--c-text3);
  margin-bottom: 6px;
  letter-spacing: .05em;
}
.phase-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  background: var(--c-green-dim);
  color: var(--c-green);
  border: 0.5px solid rgba(90,223,138,0.25);
}

/* ─── MAIN CONTENT ─── */
.main {
  margin-left: 220px;
  flex: 1;
  padding: 32px 28px 80px;
  max-width: calc(100vw - 220px);
}

/* ─── PAGE SECTIONS ─── */
.page { display: none; animation: fadeIn .18s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.page-header { margin-bottom: 28px; }
.page-header .eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--c-text3);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.page-header h1 { font-size: 26px; font-weight: 600; color: var(--c-text); line-height: 1.2; }
.page-header p { font-size: 13px; color: var(--c-text2); margin-top: 6px; line-height: 1.6; }

/* ─── CARDS ─── */
.card {
  background: var(--c-card);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  margin-bottom: 14px;
}
.card-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--c-text2);
  letter-spacing: .04em;
  margin-bottom: 14px;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

/* ─── METRIC GRID ─── */
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 16px; }
.metric {
  background: var(--c-card);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.metric-label { font-family: var(--font-mono); font-size: 10px; color: var(--c-text3); letter-spacing: .08em; margin-bottom: 6px; text-transform: uppercase; }
.metric-val { font-size: 24px; font-weight: 600; line-height: 1; }
.metric-val.green { color: var(--c-green); }
.metric-val.amber { color: var(--c-amber); }
.metric-val.blue  { color: var(--c-blue); }
.metric-val.red   { color: var(--c-red); }
.metric-sub { font-size: 11px; color: var(--c-text3); margin-top: 4px; }

/* ─── WEEK CALENDAR ─── */
.week-nav { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.week-nav .chevron {
  width: 28px; height: 28px;
  border: 0.5px solid var(--c-border2);
  border-radius: 6px;
  background: none;
  color: var(--c-text2);
  cursor: pointer;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--anim);
}
.week-nav .chevron:hover { border-color: var(--c-green); color: var(--c-green); }
.week-nav .week-label { font-family: var(--font-mono); font-size: 12px; color: var(--c-text2); flex: 1; text-align: center; }

.week-grid-labels { display: grid; grid-template-columns: repeat(7,1fr); gap: 4px; margin-bottom: 4px; }
.week-grid-labels span { text-align: center; font-family: var(--font-mono); font-size: 10px; color: var(--c-text3); letter-spacing: .05em; }
.week-grid { display: grid; grid-template-columns: repeat(7,1fr); gap: 4px; }
.week-cell {
  border-radius: var(--radius);
  background: rgba(255,255,255,0.03);
  border: 0.5px solid var(--c-border);
  min-height: 52px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  cursor: pointer;
  transition: border-color var(--anim);
  padding: 4px 2px;
}
.week-cell:hover { border-color: var(--c-border2); }
.week-cell.has-data { border-color: var(--c-border2); }
.week-cell.today { border-color: var(--c-green); }
.week-cell-num { font-family: var(--font-mono); font-size: 11px; color: var(--c-text3); }
.week-dot { width: 6px; height: 6px; border-radius: 50%; }

/* ─── ALERTS ─── */
.alert {
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  margin-bottom: 14px;
  border: 0.5px solid;
  display: flex; align-items: flex-start; gap: 10px;
}
.alert-icon { font-size: 14px; flex-shrink: 0; margin-top: 1px; }
.alert.green { background: var(--c-green-dim); border-color: rgba(90,223,138,.25); color: var(--c-green); }
.alert.amber { background: var(--c-amber-dim); border-color: rgba(240,168,50,.25); color: var(--c-amber); }
.alert.red   { background: var(--c-red-dim);   border-color: rgba(240,96,96,.25);  color: var(--c-red); }

/* ─── FORM ELEMENTS ─── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.form-grid.three { grid-template-columns: 1fr 1fr 1fr; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; color: var(--c-text3); text-transform: uppercase; }

input[type="text"], input[type="number"], input[type="date"],
select, textarea {
  width: 100%;
  background: var(--c-surface);
  border: 0.5px solid var(--c-border2);
  border-radius: var(--radius);
  padding: 9px 12px;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--c-text);
  outline: none;
  transition: border-color var(--anim);
}
input:focus, select:focus, textarea:focus { border-color: var(--c-green); }
select option { background: var(--c-surface); }
textarea { resize: vertical; min-height: 70px; line-height: 1.5; }

/* ─── RPE PICKER ─── */
.rpe-grid { display: flex; gap: 5px; flex-wrap: wrap; }
.rpe-btn {
  width: 38px; height: 38px;
  border: 0.5px solid var(--c-border2);
  border-radius: var(--radius);
  background: none;
  color: var(--c-text2);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .12s;
}
.rpe-btn:hover { border-color: var(--c-border2); background: rgba(255,255,255,.05); }
.rpe-btn.selected { color: #000; border-color: transparent; }

/* ─── BUTTONS ─── */
.btn {
  padding: 10px 20px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 0.5px solid var(--c-border2);
  background: none;
  color: var(--c-text);
  transition: all var(--anim);
  display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { background: rgba(255,255,255,.05); }
.btn-primary { background: var(--c-green); color: #0a1a10; border-color: var(--c-green); font-weight: 600; }
.btn-primary:hover { background: #6ef09f; border-color: #6ef09f; }
.btn-sm { padding: 5px 11px; font-size: 11px; }
.btn-danger { color: var(--c-red); border-color: rgba(240,96,96,.3); }
.btn-danger:hover { background: var(--c-red-dim); }

/* ─── SESSION LIST ─── */
.session-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 0.5px solid var(--c-border);
}
.session-item:last-child { border-bottom: none; }
.rpe-circle {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  color: #fff; flex-shrink: 0;
}
.sport-pill {
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}
.session-body { flex: 1; min-width: 0; }
.session-title { font-size: 13px; color: var(--c-text); }
.session-sub { font-size: 11px; color: var(--c-text3); margin-top: 2px; font-family: var(--font-mono); }

/* ─── PLAN ─── */
.phase-block { margin-bottom: 28px; }
.phase-header {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 0.5px solid var(--c-border);
}
.phase-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.phase-title { font-size: 15px; font-weight: 600; }
.phase-period { font-family: var(--font-mono); font-size: 11px; color: var(--c-text3); margin-left: auto; }

.week-block {
  background: var(--c-surface);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 8px;
}
.week-block-header {
  padding: 10px 16px;
  border-bottom: 0.5px solid var(--c-border);
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
  user-select: none;
}
.week-block-header:hover { background: rgba(255,255,255,.02); }
.week-block-title { font-size: 12px; font-weight: 500; color: var(--c-text); flex: 1; }
.week-block-meta { font-family: var(--font-mono); font-size: 10px; color: var(--c-text3); }
.week-block-toggle { font-size: 12px; color: var(--c-text3); transition: transform .15s; }
.week-block.open .week-block-toggle { transform: rotate(180deg); }
.week-block-body { display: none; padding: 4px 0; }
.week-block.open .week-block-body { display: block; }

.plan-row {
  display: flex; align-items: flex-start;
  gap: 12px; padding: 9px 16px;
  border-bottom: 0.5px solid rgba(255,255,255,.03);
}
.plan-row:last-child { border-bottom: none; }
.plan-day { font-family: var(--font-mono); font-size: 11px; color: var(--c-text3); min-width: 80px; padding-top: 1px; }
.plan-content { flex: 1; font-size: 13px; color: var(--c-text); line-height: 1.5; }
.plan-rpe-tag {
  font-family: var(--font-mono); font-size: 10px;
  padding: 2px 7px; border-radius: 20px;
  background: rgba(255,255,255,.05);
  color: var(--c-text3); white-space: nowrap; flex-shrink: 0;
}

/* ─── TECHNIQUES ─── */
.tech-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.tech-card {
  background: var(--c-surface);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.tech-card-header {
  padding: 14px 16px;
  display: flex; align-items: center; gap: 10px;
  border-bottom: 0.5px solid var(--c-border);
}
.tech-card-icon { font-size: 18px; }
.tech-card-title { font-size: 13px; font-weight: 600; }
.tech-card-sub { font-size: 11px; color: var(--c-text3); margin-top: 1px; }
.tech-exercise {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 9px 16px; border-bottom: 0.5px solid rgba(255,255,255,.03);
  gap: 10px;
}
.tech-exercise:last-child { border-bottom: none; }
.tech-ex-name { font-size: 12px; color: var(--c-text); }
.tech-ex-note { font-size: 11px; color: var(--c-text3); margin-top: 2px; font-style: italic; }
.tech-ex-sets {
  font-family: var(--font-mono); font-size: 11px;
  padding: 3px 8px; border-radius: 20px;
  border: 0.5px solid var(--c-border2);
  color: var(--c-text2); white-space: nowrap; flex-shrink: 0;
}

/* ─── CHARTS ─── */
.chart-wrap { position: relative; width: 100%; }

/* ─── FATIGUE TABLE ─── */
.ftable { width: 100%; border-collapse: collapse; font-size: 12px; }
.ftable th { font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; color: var(--c-text3); text-transform: uppercase; padding: 8px 12px; text-align: left; border-bottom: 0.5px solid var(--c-border); }
.ftable td { padding: 10px 12px; border-bottom: 0.5px solid var(--c-border); vertical-align: top; line-height: 1.5; }
.ftable tr:last-child td { border-bottom: none; }
.ftable-rpe { font-family: var(--font-mono); font-size: 11px; padding: 3px 8px; border-radius: 20px; font-weight: 500; }

/* ─── MOBILE TOGGLE ─── */
.mobile-toggle {
  display: none;
  position: fixed; top: 14px; left: 14px; z-index: 200;
  width: 36px; height: 36px;
  background: var(--c-card);
  border: 0.5px solid var(--c-border2);
  border-radius: 8px; cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 4px;
}
.mobile-toggle span { width: 18px; height: 1.5px; background: var(--c-text); border-radius: 2px; }

.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 90; }

/* ─── EMPTY STATE ─── */
.empty { text-align: center; padding: 40px 20px; color: var(--c-text3); font-size: 13px; }
.empty-icon { font-size: 32px; margin-bottom: 10px; opacity: .4; }

/* ─── SAVE TOAST ─── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--c-green-dim); color: var(--c-green);
  border: 0.5px solid rgba(90,223,138,.3);
  border-radius: var(--radius); padding: 10px 18px;
  font-size: 13px; font-weight: 500;
  opacity: 0; transform: translateY(8px);
  transition: all .2s; pointer-events: none; z-index: 999;
}
.toast.show { opacity: 1; transform: none; }

/* ─── SCROLL ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border2); border-radius: 3px; }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: none; }
  .sidebar-overlay.open { display: block; }
  .main { margin-left: 0; padding: 24px 16px 80px; max-width: 100%; }
  .mobile-toggle { display: flex; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .form-grid.three { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}