/* =========================================================
   Skill-Lite — Shared Styles
   ========================================================= */

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

/* ── Design Tokens ── */
:root {
  --bg:           #ffffff;
  --surface:      #f8fafc;
  --surface2:     #f1f5f9;
  --border:       #e2e8f0;
  --accent:       #00a4ef;
  --accent-hover: #0090d4;
  --text:         #0f172a;
  --text-muted:   #64748b;
  --success:      #059669;
  --danger:       #dc2626;
  --warn:         #d97706;
  --input-bg:     #f1f5f9;

  /* Extended */
  --surface-glass: rgba(255,255,255,0.92);
  --accent-subtle: rgba(0,164,239,.1);
  --accent-ring:   rgba(0,164,239,.22);
  --shadow-sm:  0 1px 4px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.1);
  --shadow-lg:  0 16px 48px rgba(0,0,0,.16);
  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

/* ── Base ── */
body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── App Header ── */
:root {
  --header-bg:      #0c1f3f;
  --header-bg2:     #0a1b37;
  --header-border:  rgba(255,255,255,.08);
  --header-text:    #e2eeff;
  --header-muted:   #7aa3cc;
  --header-hover-bg: rgba(255,255,255,.07);
  --header-active-bg: rgba(0,164,239,.18);
}

.app-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 200;
}

.app-header-top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 28px;
  height: 54px;
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg2);
}

.logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--accent) 0%, #38bdf8 100%);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(0,164,239,.4);
}

.app-title h1 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--header-text);
}
.app-title p { font-size: 13px; color: var(--header-muted); margin-top: 1px; }

/* ── Navigation ── */
.main-nav {
  display: flex;
  align-items: center;
  padding: 0 18px;
  height: 40px;
  overflow-x: auto;
  scrollbar-width: none;
  gap: 1px;
  background: var(--header-bg);
}
.main-nav::-webkit-scrollbar { display: none; }

.nav-link {
  color: var(--header-muted);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
  display: flex;
  align-items: center;
}
.nav-link:hover  { color: var(--header-text); background: var(--header-hover-bg); }
.nav-link.active { color: var(--accent); background: var(--header-active-bg); }

/* ── Buttons ── */
.btn {
  font-size: 14.5px; font-weight: 600;
  padding: 7px 15px; border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}
.btn:hover { background: var(--surface); border-color: var(--accent); }

.btn.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
  box-shadow: 0 4px 14px rgba(0,164,239,.25);
}
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); background: rgba(248,113,113,.07); }

/* ── Form Elements ── */
select,
input[type="text"],
input[type="password"],
input[type="url"],
input[type="email"] {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
select:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="url"]:focus,
input[type="email"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}
input::placeholder { color: var(--text-muted); opacity: 0.45; }
select { cursor: pointer; }

/* ── Layout Helpers ── */
.section-label {
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.8px; text-transform: uppercase;
  color: var(--text-muted);
}

.divider { height: 1px; background: var(--border); }

.field-group { display: flex; flex-direction: column; gap: 6px; }
.field-group label { font-size: 14px; color: var(--text-muted); font-weight: 500; }
.field-group select,
.field-group input { width: 100%; }

/* ── Empty State ── */
.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  height: 100%; gap: 12px;
  color: var(--text-muted); font-size: 16px;
  text-align: center; padding: 40px;
}
.empty-state .big { font-size: 48px; opacity: 0.25; }

/* ── Toast ── */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--success); color: #071a0f;
  font-size: 15px; font-weight: 600;
  padding: 9px 22px; border-radius: 24px;
  opacity: 0; pointer-events: none;
  transition: opacity .18s, transform .18s; z-index: 999;
  box-shadow: 0 8px 24px rgba(52,211,153,.25);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Content protection ── */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}

/* Protection toast */
#protect-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: #1e293b;
  color: #f1f5f9;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 28px;
  box-shadow: 0 8px 28px rgba(0,0,0,.45);
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s ease, transform .2s ease;
  white-space: nowrap;
}
#protect-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* =========================================================
   Themes
   ========================================================= */
html.theme-ocean {
  --accent:       #0ea5e9;
  --accent-hover: #0284c7;
  --accent-subtle: rgba(14,165,233,.1);
  --accent-ring:   rgba(14,165,233,.25);
}
html.theme-emerald {
  --accent:       #10b981;
  --accent-hover: #059669;
  --accent-subtle: rgba(16,185,129,.1);
  --accent-ring:   rgba(16,185,129,.25);
}
html.theme-amber {
  --accent:       #f59e0b;
  --accent-hover: #d97706;
  --accent-subtle: rgba(245,158,11,.1);
  --accent-ring:   rgba(245,158,11,.2);
}
html.theme-rose {
  --accent:       #f43f5e;
  --accent-hover: #e11d48;
  --accent-subtle: rgba(244,63,94,.1);
  --accent-ring:   rgba(244,63,94,.22);
}
html.theme-midnight {
  --bg:           #f1f3fb;
  --surface:      #ffffff;
  --surface2:     #eef0f8;
  --border:       #dde0f0;
  --accent:       #6c63ff;
  --accent-hover: #5a52e0;
  --accent-subtle: rgba(108,99,255,.1);
  --accent-ring:   rgba(108,99,255,.22);
  --input-bg:     #f5f7ff;
  --text:         #1a1d2e;
  --text-muted:   #6b7299;
  --surface-glass: rgba(255,255,255,0.9);
  --shadow-sm:  0 2px 8px rgba(0,0,0,.08);
  --shadow-md:  0 8px 28px rgba(0,0,0,.12);
  --shadow-lg:  0 20px 60px rgba(0,0,0,.18);
}
html.theme-nord {
  --bg:           #2e3440;
  --surface:      #3b4252;
  --surface2:     #434c5e;
  --border:       #4c566a;
  --accent:       #88c0d0;
  --accent-hover: #6aacbf;
  --text:         #eceff4;
  --text-muted:   #8d95a9;
  --input-bg:     #2a3140;
  --surface-glass: rgba(46,52,64,0.9);
  --accent-subtle: rgba(136,192,208,.1);
  --accent-ring:   rgba(136,192,208,.22);
  --shadow-sm:  0 2px 8px rgba(0,0,0,.3);
  --shadow-md:  0 8px 28px rgba(0,0,0,.4);
  --shadow-lg:  0 20px 60px rgba(0,0,0,.55);
}

/* =========================================================
   Theme Picker
   ========================================================= */
.theme-picker {
  margin-left: auto;
  position: relative;
  display: flex;
  align-items: center;
}

.theme-trigger {
  display: flex;
  align-items: center;
  gap: 7px;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--header-muted);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  padding: 5px 10px;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  white-space: nowrap;
  font-family: inherit;
}
.theme-trigger:hover {
  color: var(--header-text);
  background: var(--header-hover-bg);
  border-color: var(--header-border);
}
.theme-trigger-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  transition: background 0.2s;
  box-shadow: 0 0 6px var(--accent);
}

.theme-panel {
  position: fixed;
  z-index: 1000;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  gap: 12px;
  min-width: 210px;
}
.theme-panel.open { display: flex; }

.theme-panel-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.theme-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.theme-opt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.theme-swatch {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--c, #6c63ff);
  transition: border-color 0.15s, transform 0.12s, box-shadow 0.15s;
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.theme-swatch::after {
  content: '✓';
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.15s;
  text-shadow: 0 1px 4px rgba(0,0,0,.5);
}
.theme-opt:hover .theme-swatch {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0,0,0,.4);
}
.theme-opt.active .theme-swatch {
  border-color: rgba(255,255,255,.8);
  box-shadow: 0 0 0 3px rgba(255,255,255,.12);
}
.theme-opt.active .theme-swatch::after { opacity: 1; }

.theme-opt-name {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}
.theme-opt.active .theme-opt-name { color: var(--text); }

/* ── Dropdown Menus ── */
.nav-menu {
  position: relative;
  display: flex;
  align-items: stretch;
}

.nav-menu-trigger {
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--header-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 500;
  padding: 5px 12px;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}
.nav-menu-trigger:hover,
.nav-menu.open .nav-menu-trigger {
  color: var(--header-text);
  background: var(--header-hover-bg);
}
.nav-menu.active .nav-menu-trigger {
  color: #7dd3fc;
  background: var(--header-active-bg);
}

.nav-chevron {
  font-size: 9px;
  opacity: 0.45;
  transition: transform 0.18s;
}
.nav-menu.open .nav-chevron { transform: rotate(180deg); }

.nav-dropdown {
  display: none;
  flex-direction: column;
  gap: 1px;
  position: fixed;
  min-width: 210px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px;
  box-shadow: var(--shadow-lg);
  z-index: 500;
}
.nav-menu.open .nav-dropdown { display: flex; }

.nav-dropdown-item {
  align-items: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  display: flex;
  font-size: 15px;
  font-weight: 500;
  gap: 9px;
  padding: 8px 12px;
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
}
.nav-dropdown-item:hover {
  background: var(--surface2);
  color: var(--text);
}
.nav-dropdown-item.active {
  color: var(--accent);
  background: var(--accent-subtle);
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 6px;
}