/* ============================================================
   STYLE CHUNG - MODERN TRAINING UI (Be Vietnam Pro + Light/Dark Themes)
   - Theme switch dựa trên: <html data-theme="light|dark">
   - Không neon/glow
   ============================================================ */

/* FONT — Be Vietnam Pro (tối ưu tiếng Việt, đọc lâu) */
@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700&display=swap');

/* RESET */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* Color scheme theo theme (trình duyệt dùng cho form controls/scrollbar mặc định) */
html { color-scheme: dark; }
:root[data-theme="light"] { color-scheme: light; }

/* ===============================
   THEME TOKENS (SEMANTIC)
   =============================== */
:root{
  /* Layout */
  --radius: 12px;
  --radius-lg: 16px;

  /* Core (mặc định dark) */
  --bg: #0B1220;
  --bg2: #0E172A;
  --surface: #111B2E;
  --surface2: #16233B;
  --border: #24324A;

  --text: #E7EEF9;
  --text2: #B8C6DA;
  --muted: #8AA0BF;

  /* Accent */
  --primary: #22C3A6;     /* aqua */
  --primary-hover: #1BA78F;
  --secondary: #6D7CFF;   /* indigo */

  --success: #34D399;
  --warning: #FBBF24;
  --danger:  #FB7185;

  /* Shadows (không glow) */
  --shadow-sm: 0 6px 14px rgba(0,0,0,.22);
  --shadow-md: 0 10px 24px rgba(0,0,0,.30);

  /* Compatibility mapping (để các class cũ không vỡ) */
  --neon-blue: var(--primary);
  --neon-light: var(--text);
  --dark-bg: var(--bg);
  --panel-bg: rgba(17, 27, 46, 0.92);
}

:root[data-theme="light"]{
  --bg: #F3F6FB;
  --bg2: #EEF3FA;
  --surface: #FFFFFF;
  --surface2: #F5F8FF;
  --border: #D7E2F1;

  --text: #0F172A;   /* ink, không đen tuyệt đối */
  --text2: #334155;
  --muted: #64748B;

  --primary: #0EA5A6;       /* teal */
  --primary-hover: #0B8C8D;
  --secondary: #2563EB;

  --success: #16A34A;
  --warning: #F59E0B;
  --danger:  #EF4444;

  --shadow-sm: 0 6px 14px rgba(15, 23, 42, 0.10);
  --shadow-md: 0 10px 24px rgba(15, 23, 42, 0.14);

  --panel-bg: rgba(255,255,255,0.92);
}

/* ===============================
   BASE
   =============================== */
html, body{
  height: 100%;
  color: var(--text);
  background-color: var(--bg);
}

body{
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;

  /* Nền “êm” (không trắng/đen gắt) */
  background:
    radial-gradient(1200px 700px at 20% -10%, rgba(34,195,166,0.12), transparent 60%),
    radial-gradient(900px 600px at 90% 10%, rgba(109,124,255,0.10), transparent 55%),
    linear-gradient(180deg, var(--bg2), var(--bg) 55%);
}

/* Typography defaults để tránh “kẹt màu” ở một số tag */
p, li, label { color: var(--text); }
small { color: var(--muted); }
strong { color: var(--text); }
hr { border: 0; border-top: 1px solid var(--border); }

/* Form controls inherit theme colors */
button, input, select, textarea{
  font-family: inherit;
  color: inherit;
}

/* Links: luôn theo theme */
a{
  color: var(--text2);
  text-decoration: none;
}
a:visited{ color: var(--text2); }
a:hover{ color: var(--text); }

/* Focus (không neon) */
:focus{ outline: none; }
:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--primary), transparent 35%);
  outline-offset: 2px;
  border-radius: 10px;
}

/* Text helpers */
.neon-text{ color: var(--text); text-shadow: none; } /* giữ class cũ nhưng bỏ glow */
.section-title{
  margin: 20px 0;
  color: var(--text);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .2px;
}

/* ===============================
   HEADER / NAVBAR (không neon)
   Lưu ý: header.php có thể override thêm (inline style). Ở đây chỉ “base safe”.
   =============================== */
.neon-header{
  position: fixed;
  top: 0; left: 0;
  width: 100%;

  height: 44px;
  min-height: 44px;

  background: rgba(17, 27, 46, 0.72);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 0 16px;
  z-index: 1000;
}
:root[data-theme="light"] .neon-header{
  background: rgba(255,255,255,0.78);
}

/* Logo */
.logo h2,
.logo-text h2{
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .2px;
  text-shadow: none;
}
.logo .sub,
.logo-text .sub{
  font-size: 12px;
  color: var(--muted);
  text-shadow: none;
}

/* Nav */
.nav-menu{
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-menu a{
  color: var(--text2);
  text-decoration: none;
  font-size: 13px;
  padding: 6px 8px;
  border-radius: 10px;
  transition: background .15s ease, color .15s ease, transform .12s ease;
}
.nav-menu a:hover{
  color: var(--text);
  background: rgba(255,255,255,0.06);
}
:root[data-theme="light"] .nav-menu a:hover{
  background: rgba(15,23,42,0.05);
}

/* ===============================
   USER PANEL (nếu còn trang nào dùng)
   =============================== */
.user-panel{
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 14px;
  border-left: 1px solid var(--border);
  height: 44px;
}
.icon-avatar{ display: none; }
.user-info{
  display:flex;
  flex-direction:column;
  justify-content:center;
  line-height:1.2;
}
.user-name{
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
}
.user-role{ font-size: 11px; color: var(--muted); }
.logout-btn, .login-btn{
  font-size: 11px;
  color: var(--text2);
  text-decoration: none;
  margin-top: 3px;
}
.logout-btn:hover, .login-btn:hover{
  color: var(--text);
  text-shadow: none;
}

/* ===============================
   FOOTER (không neon)
   =============================== */
.neon-footer{
  margin-top: 60px;
  padding: 22px 0;
  background: rgba(17,27,46,.60);
  text-align: center;
  border-top: 1px solid var(--border);
  box-shadow: none;
}
:root[data-theme="light"] .neon-footer{
  background: rgba(255,255,255,.70);
}
.neon-footer h3{
  color: var(--text);
  font-weight: 700;
}
.neon-footer .copy{
  color: var(--muted);
  font-size: 13px;
}

/* ===============================
   PANEL (card/surface)
   =============================== */
.panel{
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 18px;
  margin: 20px 0;
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.panel:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--border), var(--primary) 18%);
}

/* ===============================
   GRID
   =============================== */
.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.grid-2{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* ===============================
   BUTTON
   =============================== */
.btn-neon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;

  padding: 10px 16px;
  border-radius: 12px;

  border: 1px solid color-mix(in srgb, var(--primary), var(--border) 30%);
  background: color-mix(in srgb, var(--primary), transparent 82%);
  color: var(--text);
  text-decoration: none;

  font-weight: 600;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.btn-neon:hover{
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--primary-hover), transparent 78%);
  border-color: color-mix(in srgb, var(--primary-hover), var(--border) 20%);
  box-shadow: none;
}

/* ===============================
   LOGO HEADER (fit)
   =============================== */
.logo-wrapper{
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
}
.site-logo{
  height: 34px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
  image-rendering: auto;
}
.logo-container{
  height: 34px;
  width: auto;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.logo-container img{
  height: 100%;
  width: auto;
  object-fit: contain;
  display: block;
}
.logo-text h2{
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  text-shadow: none;
}
.logo-text .sub{
  font-size: 12px;
  color: var(--muted);
  margin-top: -2px;
  display: block;
}

/* ===============================
   ANALYTICS WIDGET
   =============================== */
.analytics-widget{
  width:100%;
  max-width:1200px;
  margin:14px auto 0;
  padding:0 12px;
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(150px, 1fr));
  gap:10px;
}
.analytics-widget .box{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  text-align:center;
  box-shadow: var(--shadow-sm);
}
.analytics-widget strong{
  display:block;
  font-size:18px;
  color: var(--text);
}
.analytics-widget span{
  font-size:12px;
  color: var(--muted);
}

/* ===============================
   RESPONSIVE
   =============================== */
@media (max-width: 768px){
  .nav-menu{ gap: 10px; }

  .grid-3,
  .grid-2{ grid-template-columns: 1fr; }

  .logo h2{ font-size: 14px; }

  /* giữ header mobile nếu header.php override thì vẫn ưu tiên header.php */
  .neon-header{ height: 55px; min-height: 55px; }
  .logo-wrapper{ height: 55px; }

  /* menu mobile links thường nằm trong #mainMenu (header.php) */
  #mainMenu a{ color: var(--text2); }
  #mainMenu a:hover{ color: var(--text); }
}