/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }

/* ===== VARIABLES ===== */
:root {
  color-scheme: light;

  --bg:             #f0f4ff;
  --bg-alt:         #e8eeff;
  --surface:        #ffffff;
  --panel:          #f8faff;
  --surface-strong: #eef2ff;
  --border:         #dde5f4;
  --border-soft:    #eef2ff;

  --text:           #0f172a;
  --text-soft:      #334155;
  --muted:          #64748b;

  --primary:        #2563eb;
  --primary-h:      #1d4ed8;
  --primary-bg:     rgba(37, 99, 235, 0.1);
  --accent:         #f97316;
  --accent-bg:      rgba(249, 115, 22, 0.1);

  --success:        #16a34a;
  --success-bg:     rgba(22, 163, 74, 0.1);
  --danger:         #ef4444;
  --danger-bg:      rgba(239, 68, 68, 0.1);

  --r-sm:   8px;
  --r-md:   12px;
  --r-lg:   16px;
  --r-xl:   20px;
  --r-2xl:  28px;
  --r-full: 9999px;

  --shadow-sm: 0 1px 4px rgba(15,23,42,.06);
  --shadow-md: 0 4px 20px rgba(15,23,42,.08);
  --shadow-lg: 0 8px 40px rgba(15,23,42,.10);

  --nav-h: 66px;
  --t: .18s ease;
}

/* ===== DARK MODE ===== */
body.dark-mode {
  color-scheme: dark;
  --bg:             #07101e;
  --bg-alt:         #0d1b2e;
  --surface:        #111e30;
  --panel:          #0f1a2a;
  --surface-strong: #172235;
  --border:         #1e3050;
  --border-soft:    #162540;
  --text:           #e8f0fe;
  --text-soft:      #b8c8e8;
  --muted:          #7a90b0;
  --primary-bg:     rgba(37,99,235,.18);
  --accent-bg:      rgba(249,115,22,.15);
  --success-bg:     rgba(22,163,74,.15);
  --danger-bg:      rgba(239,68,68,.15);
  --shadow-sm: 0 1px 4px rgba(0,0,0,.30);
  --shadow-md: 0 4px 20px rgba(0,0,0,.40);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.50);
}

/* ===== BASE ===== */
body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(ellipse 60% 50% at 0% 0%, rgba(37,99,235,.07) 0%, transparent 55%),
    radial-gradient(ellipse 40% 35% at 100% 100%, rgba(249,115,22,.05) 0%, transparent 55%),
    var(--bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  transition: background var(--t), color var(--t);
}

h1 { font-size: clamp(1.45rem, 3vw, 2rem);  font-weight: 800; letter-spacing: -.025em; color: var(--text); margin-bottom: 14px; }
h2 { font-size: clamp(1.05rem, 2vw, 1.25rem); font-weight: 700; letter-spacing: -.01em;  color: var(--text); margin-bottom: 12px; }
h3 { font-size: .95rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
p  { color: var(--text-soft); margin-bottom: 0; }
a  { color: var(--primary); }

/* ===== HEADER ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.90);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background var(--t), border-color var(--t);
}
body.dark-mode header { background: rgba(11,22,42,.90); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--nav-h);
  padding: 0 28px;
  max-width: 1280px;
  margin: 0 auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.03em;
}
.logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: var(--r-md);
  background: #000;
  flex-shrink: 0;
}
.logo-text em { color: var(--primary); font-style: normal; }

/* Desktop nav */
nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border-radius: var(--r-full);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: background var(--t), color var(--t);
  white-space: nowrap;
}
nav a:hover { background: var(--primary-bg); color: var(--primary); }
nav a.active { background: var(--primary-bg); color: var(--primary); font-weight: 600; }

.nav-divider { width: 1px; height: 22px; background: var(--border); margin: 0 6px; flex-shrink: 0; }

/* Logout button styled as nav link */
.btn-logout {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border-radius: var(--r-full);
  font-size: .875rem;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  width: auto;
  margin-top: 0;
  box-shadow: none;
  transition: background var(--t), color var(--t);
}
.btn-logout:hover { background: var(--danger-bg); color: var(--danger); transform: none; box-shadow: none; }

/* Theme toggle */
.btn-theme {
  width: 38px; height: 38px;
  border-radius: var(--r-md);
  background: var(--surface-strong);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  width: auto;
  padding: 0 10px;
  margin-top: 0;
  box-shadow: none;
  transition: background var(--t), border-color var(--t);
}
.btn-theme:hover { background: var(--primary-bg); border-color: var(--primary); transform: none; box-shadow: none; }

/* User badge */
.nav-user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px 5px 6px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
}
.nav-avatar {
  width: 26px; height: 26px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: .75rem; font-weight: 700;
  flex-shrink: 0;
}
.nav-user-name { font-size: .82rem; font-weight: 600; color: var(--text); max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.role-tag {
  font-size: .68rem;
  padding: 2px 8px;
  border-radius: var(--r-full);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.role-coach  { background: var(--accent-bg);            color: var(--accent); }
.role-client { background: var(--primary-bg);           color: var(--primary); }
.role-admin  { background: rgba(124,58,237,.12);        color: #7c3aed; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  background: var(--surface-strong);
  border: 1px solid var(--border);
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 0;
  width: 40px;
  padding: 0;
  box-shadow: none;
  transition: background var(--t);
  z-index: 110;
}
.nav-toggle:hover { background: var(--primary-bg); box-shadow: none; transform: none; }
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--t), opacity var(--t);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Nav overlay (mobile) */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--t);
  backdrop-filter: blur(2px);
}

/* ===== MAIN ===== */
main {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 24px 56px;
}

/* ===== CARD / BOX ===== */
.box {
  background: var(--surface);
  border-radius: var(--r-2xl);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  margin-bottom: 22px;
  transition: background var(--t), border-color var(--t);
}
.form-box { max-width: 480px; margin-left: auto; margin-right: auto; }

/* ===== BUTTONS ===== */
/* Base */
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--r-lg);
  font-family: inherit;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: transform var(--t), box-shadow var(--t), background var(--t), color var(--t), border-color var(--t);
  white-space: nowrap;
  vertical-align: middle;
}
/* Primary (default submit / .button) */
.button,
form button[type="submit"],
form button:not([type]) {
  background: linear-gradient(135deg, var(--primary), var(--primary-h));
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,.28);
  width: auto;
  margin-top: 0;
}
.button:hover,
form button[type="submit"]:hover,
form button:not([type]):hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37,99,235,.36);
}
/* Full-width submit inside a simple form */
section.box > form button[type="submit"],
section.box > form button:not([type]),
.form-box form button[type="submit"] {
  width: 100%;
  margin-top: 20px;
  padding: 13px 24px;
  font-size: .95rem;
}
/* Secondary */
.button-secondary {
  background: var(--surface-strong) !important;
  color: var(--text-soft) !important;
  border: 1.5px solid var(--border) !important;
  box-shadow: var(--shadow-sm) !important;
}
.button-secondary:hover {
  background: var(--primary-bg) !important;
  border-color: var(--primary) !important;
  color: var(--primary) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md) !important;
}
/* Danger */
.button-danger,
button.button-danger {
  background: var(--danger) !important;
  color: #fff !important;
  border: none !important;
  box-shadow: 0 4px 12px rgba(239,68,68,.25) !important;
}
.button-danger:hover {
  background: #dc2626 !important;
  box-shadow: 0 6px 16px rgba(239,68,68,.35) !important;
}
/* Small action buttons (edit, delete in table rows) */
.btn-sm {
  padding: 6px 12px !important;
  font-size: .78rem !important;
  border-radius: var(--r-md) !important;
  margin-top: 0 !important;
  width: auto !important;
  box-shadow: none !important;
}
.btn-sm:hover { transform: none !important; }

/* ===== FORMS ===== */
form label {
  display: block;
  margin-top: 14px;
  margin-bottom: 6px;
  font-size: .78rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}
input, select, textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: var(--r-lg);
  border: 1.5px solid var(--border);
  font-family: inherit;
  font-size: .925rem;
  background: var(--bg-alt);
  color: var(--text);
  transition: border-color var(--t), box-shadow var(--t), background var(--t);
  -webkit-appearance: none;
  appearance: none;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-bg);
  background: var(--surface);
}
textarea { min-height: 90px; resize: vertical; }
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 34px;
}
.readonly-field {
  padding: 11px 14px;
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  border-radius: var(--r-lg);
  color: var(--muted);
  font-size: .925rem;
}

/* Inline form layout */
.inline-form { display: grid; gap: 8px; }
.inline-form button { width: auto; margin-top: 0; padding: 9px 16px; font-size: .83rem; }
.inline-form--row { display: inline-flex; flex-direction: column; gap: 6px; }

/* ===== ALERTS ===== */
.error, .success {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 16px;
  border-radius: var(--r-lg);
  margin-bottom: 18px;
  font-size: .875rem;
  font-weight: 500;
  border-width: 1px;
  border-style: solid;
}
.error   { background: var(--danger-bg);  color: var(--danger);  border-color: rgba(239,68,68,.2); }
.success { background: var(--success-bg); color: var(--success); border-color: rgba(22,163,74,.2); }

/* ===== TABLES ===== */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--r-xl);
  border: 1px solid var(--border-soft);
  margin-top: 14px;
}
table { width: 100%; border-collapse: collapse; }
thead th {
  padding: 12px 16px;
  background: var(--surface-strong);
  font-size: .75rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  text-align: left;
  white-space: nowrap;
}
thead tr th:first-child { border-radius: var(--r-md) 0 0 0; }
thead tr th:last-child  { border-radius: 0 var(--r-md) 0 0; }
tbody tr { border-bottom: 1px solid var(--border-soft); transition: background var(--t); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--panel); }
tbody td {
  padding: 13px 16px;
  font-size: .875rem;
  color: var(--text-soft);
  vertical-align: middle;
}
tbody td strong { color: var(--text); }

/* ===== GRIDS ===== */
.grid-two {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 24px;
}

/* ===== HOME PAGE ===== */
.home-hero { padding: 12px 0 20px; }
.home-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: 10px; }
.home-hero p { font-size: 1rem; color: var(--muted); max-width: 540px; margin-bottom: 0; }

.home-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 18px;
  margin: 28px 0 24px;
}
.home-cards article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 22px;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.home-cards article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.card-icon {
  width: 46px; height: 46px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 14px;
}
.card-icon-blue   { background: var(--primary-bg); }
.card-icon-orange { background: var(--accent-bg); }
.card-icon-green  { background: var(--success-bg); }
.home-cards h2 { font-size: .95rem; margin-bottom: 6px; }
.home-cards p  { font-size: .85rem; color: var(--muted); margin: 0; }

.home-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 4px; }

/* ===== DASHBOARD ===== */
.dash-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }

/* ===== WEEK NAV ===== */
.week-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 22px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.week-button {
  flex-shrink: 0;
  background: var(--surface-strong);
  color: var(--text-soft);
  border: 1.5px solid transparent;
  border-radius: var(--r-full);
  padding: 9px 17px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  margin-top: 0;
  box-shadow: none;
  transition: all var(--t);
}
.week-button:hover {
  background: var(--primary-bg);
  color: var(--primary);
  border-color: var(--primary);
  transform: none;
  box-shadow: none;
}
.week-button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(37,99,235,.28);
}
.day-content        { display: none; }
.day-content.active { display: block; }

/* Week navigation (prev / next) */
.week-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}
.week-header p { margin: 0; font-weight: 600; color: var(--text-soft); }

/* ===== CHART ===== */
.chart-container { position: relative; width: 100%; min-height: 300px; }

/* ===== COACH CLIENT PROGRAM ===== */
.coach-client-program .edit-plan-card {
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  border-radius: var(--r-xl);
  padding: 20px;
  margin: 6px 0;
}
.coach-client-program .button-danger { background: var(--danger); color: #fff; }
.table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.program-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.program-table th {
  padding: 12px 14px;
  background: var(--surface-strong);
  font-size: .75rem; font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  text-align: left; white-space: nowrap;
}
.program-table td {
  padding: 12px 14px;
  font-size: .875rem;
  color: var(--text-soft);
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}
.program-table tr:last-child td { border-bottom: none; }
.program-table tr:hover td { background: var(--panel); }
.coach-client-program__panels { gap: 28px; }

/* Edit/log action buttons inside tables */
.edit-log-button,
.edit-plan-button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border-radius: var(--r-md);
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--border);
  background: var(--surface-strong);
  color: var(--text-soft);
  width: auto;
  margin-top: 0;
  box-shadow: none;
  transition: all var(--t);
}
.edit-log-button:hover,
.edit-plan-button:hover {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary);
  transform: none; box-shadow: none;
}

/* ===== FOOTER ===== */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border-soft);
  padding: 24px 28px;
  text-align: center;
  transition: background var(--t);
}
footer p { font-size: .83rem; color: var(--muted); margin: 0; }

/* ===== UTILITY ===== */
.mt-2  { margin-top: 8px; }
.mt-3  { margin-top: 12px; }
.mt-4  { margin-top: 16px; }
.gap-2 { gap: 8px; }
.flex  { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }

/* ===== RESPONSIVE ===== */

/* Large tablets */
@media (max-width: 1100px) {
  .coach-client-program .coach-client-program__panels { grid-template-columns: 1fr; }
}

/* Tablets */
@media (max-width: 900px) {
  main { padding: 20px 18px 44px; }
  .topbar { padding: 0 18px; }
  .grid-two { grid-template-columns: 1fr; gap: 16px; }
  .home-cards { grid-template-columns: repeat(2, 1fr); }
  .box { padding: 22px; border-radius: var(--r-xl); }
}

/* Mobile */
@media (max-width: 640px) {
  /* Show hamburger */
  .nav-toggle { display: flex; }
  .nav-overlay { display: block; }

  /* Slide-in drawer */
  nav {
    position: fixed;
    top: 0; right: 0;
    width: min(300px, 88vw);
    height: 100dvh;
    background: var(--surface);
    border-left: 1px solid var(--border);
    box-shadow: -8px 0 40px rgba(15,23,42,.18);
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: calc(var(--nav-h) + 12px) 14px 28px;
    transform: translateX(110%);
    transition: transform var(--t);
    z-index: 105;
    overflow-y: auto;
  }
  body.dark-mode nav { box-shadow: -8px 0 40px rgba(0,0,0,.5); }
  nav.is-open { transform: translateX(0); }
  nav a {
    padding: 12px 14px;
    border-radius: var(--r-lg);
    font-size: .95rem;
    width: 100%;
  }
  .btn-logout { width: 100%; padding: 12px 14px; border-radius: var(--r-lg); justify-content: flex-start; font-size: .95rem; }
  .btn-theme  { width: 100%; padding: 12px 14px; border-radius: var(--r-lg); justify-content: flex-start; font-size: .95rem; }
  .nav-divider { width: 100%; height: 1px; margin: 6px 0; }
  .nav-user { width: 100%; border-radius: var(--r-lg); padding: 10px 14px; }
  .nav-overlay.is-open { opacity: 1; pointer-events: all; }

  .topbar { padding: 0 16px; }
  main { padding: 16px 12px 40px; }
  .box { padding: 16px; border-radius: var(--r-xl); }
  h1 { font-size: 1.35rem; }
  .home-cards { grid-template-columns: 1fr; }
  .home-actions { flex-direction: column; }
  .home-actions .button,
  .home-actions .button-secondary { width: 100%; text-align: center; }
  .dash-actions { flex-direction: column; }
  .dash-actions .button,
  .dash-actions .button-secondary { width: 100%; }

  /* Tables scroll on mobile */
  .box table { min-width: 540px; }
  .box { overflow-x: auto; }

  .week-button { padding: 8px 13px; font-size: .8rem; }
  .week-nav { gap: 6px; }

  section.box > form button[type="submit"],
  .form-box form button[type="submit"] { padding: 13px 20px; }
}

@media (max-width: 400px) {
  .topbar { gap: 8px; }
  .logo-text { display: none; }
}