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

:root {
  --green: #00B87A;
  --green-light: #E6F9F3;
  --green-mid: #B3EDD8;
  --green-dark: #007A51;
  --blue: #2E7CF6;
  --blue-light: #EBF2FF;
  --orange: #F07C1E;
  --orange-light: #FEF0E3;
  --red: #E8374A;
  --red-light: #FDEAEC;
  --yellow: #F5A623;
  --yellow-light: #FEF6E4;
  --purple: #7B5CF0;
  --purple-light: #F0ECFF;

  --bg: #F5F6F4;
  --surface: #FFFFFF;
  --surface2: #F0F1EE;
  --border: #E2E4DF;
  --border2: #CDD0C9;
  --text: #1A1E18;
  --text2: #5A6257;
  --text3: #9AA396;

  --easy-color: #00B87A;
  --easy-bg: #E6F9F3;
  --tempo-color: #2E7CF6;
  --tempo-bg: #EBF2FF;
  --long-color: #F07C1E;
  --long-bg: #FEF0E3;
  --interval-color: #E8374A;
  --interval-bg: #FDEAEC;
  --recovery-color: #7B5CF0;
  --recovery-bg: #F0ECFF;
  --race-color: #F5A623;
  --race-bg: #FEF6E4;
  --rest-color: #9AA396;
  --rest-bg: #F5F6F4;

  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'Barlow', sans-serif;
  --radius: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── NAV ── */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
}
.nav-logo span { color: var(--green); }

.nav-links { display: flex; gap: 4px; }
.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s;
  border: none;
  background: none;
  font-family: var(--font-body);
}
.nav-link:hover { background: var(--surface2); color: var(--text); }
.nav-link.active { background: var(--green-light); color: var(--green-dark); font-weight: 600; }

.nav-actions { display: flex; gap: 8px; }

/* ── BUTTONS ── */
.btn {
  padding: 9px 20px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-dark); }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border2); }
.btn-secondary:hover { background: var(--border); }
.btn-outline { background: transparent; color: var(--green); border: 1.5px solid var(--green); }
.btn-outline:hover { background: var(--green-light); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 13px 32px; font-size: 16px; }
.btn-icon { width: 36px; height: 36px; padding: 0; justify-content: center; border-radius: var(--radius); }

/* ── CARDS ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.card-pad { padding: 20px; }

/* ── FORM ── */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-input {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border2);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}
.form-input:focus { border-color: var(--green); }
.form-input option { background: #fff; }

/* ── SECTION LABEL ── */
.section-label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 10px;
}

/* ── DAY TOGGLES ── */
.day-toggles { display: grid; grid-template-columns: repeat(7,1fr); gap: 4px; }
.day-toggle {
  padding: 9px 0;
  text-align: center;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  border: 1.5px solid var(--border2);
  background: var(--surface);
  color: var(--text3);
  transition: all 0.15s;
  user-select: none;
}
.day-toggle.on {
  background: var(--green-light);
  border-color: var(--green);
  color: var(--green-dark);
}

/* ── PHASE PILLS ── */
.phase-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.pill-base { background: var(--green-light); color: var(--green-dark); }
.pill-build { background: var(--blue-light); color: #1A5BC4; }
.pill-peak { background: var(--orange-light); color: #C05A0A; }
.pill-taper { background: var(--purple-light); color: #5A3DC4; }

/* ── SESSION CHIPS ── */
.session-chip {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}
.chip-easy { background: var(--easy-bg); color: var(--easy-color); }
.chip-tempo { background: var(--tempo-bg); color: var(--tempo-color); }
.chip-long { background: var(--long-bg); color: var(--long-color); }
.chip-interval { background: var(--interval-bg); color: var(--interval-color); }
.chip-recovery { background: var(--recovery-bg); color: var(--recovery-color); }
.chip-race { background: var(--race-bg); color: var(--yellow); }
.chip-rest { background: var(--rest-bg); color: var(--rest-color); }
.chip-strides { background: var(--green-light); color: var(--green-dark); }

/* ── STAT CARDS ── */
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; }
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow);
}
.stat-val {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--green);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-lbl { font-size: 12px; color: var(--text3); font-weight: 500; }

/* ── MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  padding: 20px;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow-md);
  transform: translateY(16px) scale(0.98);
  transition: transform 0.2s;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--text);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  z-index: 2000;
  opacity: 0;
  transition: all 0.25s;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}