/* ===== ROOT VARIABLES ===== */
:root {
  --red: #D32F2F; --red-dark: #B71C1C; --red-light: #FFEBEE; --red-soft: #FFCDD2;
  --black: #1A1A1A; --gray-dark: #333; --gray: #666; --gray-light: #EEE;
  --gray-bg: #F5F5F5; --white: #FFF; --border: #E0E0E0;
  --success: #2E7D32; --success-light: #E8F5E9; --success-border: #A5D6A7;
  --warning: #E65100; --warning-light: #FFF3E0;
  --info: #1565C0; --info-light: #E3F2FD; --info-border: #90CAF9;
  --shadow: 0 2px 12px rgba(0,0,0,.08); --shadow-lg: 0 6px 28px rgba(0,0,0,.13);
  --radius: 10px; --font: 'Outfit', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--gray-bg); color: var(--black); min-height: 100vh; display: flex; flex-direction: column; }

/* ===== HEADER ===== */
header { background: var(--white); border-bottom: 3px solid var(--red); padding: 0 24px; position: sticky; top: 0; z-index: 200; box-shadow: 0 2px 8px rgba(0,0,0,.08); }
.header-inner { max-width: 1140px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 10px 0; gap: 16px; }
.logo-link { display: flex; align-items: center; text-decoration: none; }
.logo-img { height: 50px; display: block; }
.logo-text { align-items: center; gap: 10px; }
.logo-cross { font-size: 32px; color: var(--red); font-weight: 900; line-height: 1; }
.logo-name { font-size: 18px; color: var(--black); }
.header-sub { font-size: 13px; color: var(--gray); }

/* ===== NAV ===== */
nav { background: var(--white); border-bottom: 1px solid var(--border); padding: 0 24px; }
.nav-inner { max-width: 1140px; margin: 0 auto; display: flex; flex-wrap: wrap; }
.nav-link { padding: 14px 20px; font-size: 14px; font-weight: 600; color: var(--gray); text-decoration: none; border-bottom: 3px solid transparent; transition: all .2s; white-space: nowrap; }
.nav-link:hover { color: var(--red); }
.nav-link.active { color: var(--red); border-bottom-color: var(--red); }
.nav-admin { margin-left: auto; }

/* ===== MAIN ===== */
.main-wrap { max-width: 1140px; width: 100%; margin: 0 auto; padding: 36px 24px 60px; flex: 1; }

/* ===== FOOTER ===== */
footer { background: var(--black); color: #aaa; padding: 16px 24px; margin-top: auto; }
.footer-inner { max-width: 1140px; margin: 0 auto; display: flex; justify-content: space-between; font-size: 13px; }

/* ===== PAGE TITLE ===== */
.page-header { margin-bottom: 28px; }
.page-title { font-size: 28px; font-weight: 800; color: var(--black); margin-bottom: 6px; line-height: 1.2; }
.page-sub { color: var(--gray); font-size: 15px; }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 10px 20px; border-radius: 8px; font-family: var(--font); font-size: 14px; font-weight: 600; cursor: pointer; border: none; transition: all .18s; text-decoration: none; }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-lg { padding: 13px 28px; font-size: 15px; }
.btn-primary { background: var(--red); color: var(--white); }
.btn-primary:hover { background: var(--red-dark); }
.btn-outline { background: var(--white); color: var(--red); border: 1.5px solid var(--red); }
.btn-outline:hover { background: var(--red-light); }
.btn-gray { background: var(--gray-light); color: var(--gray-dark); }
.btn-gray:hover { background: #ddd; }
.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #1B5E20; }
.btn-danger { background: #c62828; color: var(--white); }
.btn-danger:hover { background: #b71c1c; }
.btn-info { background: var(--info); color: var(--white); }
.btn-info:hover { background: #0D47A1; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ===== ALERTS ===== */
.alert { padding: 14px 18px; border-radius: 8px; font-size: 14px; font-weight: 500; margin-bottom: 20px; display: flex; align-items: flex-start; gap: 10px; }
.alert-success { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.alert-error   { background: var(--red-light); color: #C62828; border: 1px solid var(--red-soft); }
.alert-info    { background: var(--info-light); color: var(--info); border: 1px solid var(--info-border); }
.alert-warning { background: var(--warning-light); color: var(--warning); border: 1px solid #FFCC80; }

/* ===== FILTER BAR ===== */
.filter-bar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; align-items: center; }
.filter-bar select, .filter-bar input[type="text"] {
  padding: 9px 14px; border: 1.5px solid var(--border); border-radius: 8px;
  font-family: var(--font); font-size: 14px; background: var(--white); outline: none;
}
.filter-bar select:focus, .filter-bar input:focus { border-color: var(--red); }

/* ===== COURSE GRID ===== */
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 20px; }
.course-card { background: var(--white); border-radius: var(--radius); border: 1.5px solid var(--border); box-shadow: var(--shadow); overflow: hidden; transition: box-shadow .2s, transform .2s; display: flex; flex-direction: column; }
.course-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card-head { background: var(--red); padding: 16px 20px; display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.card-title { color: var(--white); font-size: 17px; font-weight: 700; line-height: 1.3; flex: 1; }
.card-badge { background: rgba(255,255,255,.2); color: var(--white); font-size: 10px; font-weight: 700; padding: 3px 9px; border-radius: 20px; white-space: nowrap; letter-spacing: .5px; text-transform: uppercase; flex-shrink: 0; }
.card-id { font-size: 11px; color: rgba(255,255,255,.7); margin-top: 4px; font-family: monospace; }
.card-body { padding: 16px 20px; flex: 1; }
.info-row { display: flex; align-items: flex-start; gap: 9px; font-size: 13.5px; color: var(--gray-dark); margin-bottom: 8px; line-height: 1.45; }
.info-row .ico { flex-shrink: 0; width: 18px; text-align: center; }
.card-desc { font-size: 13px; color: var(--gray); margin-top: 10px; line-height: 1.55; }
.card-foot { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; gap: 10px; align-items: center; justify-content: space-between; }
.spots-badge { font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 20px; }
.spots-ok   { background: var(--success-light); color: var(--success); }
.spots-low  { background: var(--warning-light); color: var(--warning); }
.spots-full { background: var(--gray-light); color: var(--gray); }

/* ===== FORMS ===== */
.form-card { background: var(--white); border-radius: var(--radius); border: 1.5px solid var(--border); padding: 32px; box-shadow: var(--shadow); max-width: 740px; }
.form-section { font-size: 15px; font-weight: 700; color: var(--red); margin: 26px 0 14px; padding-bottom: 8px; border-bottom: 2px solid var(--red-soft); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.form-1 { grid-column: 1 / -1; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 13.5px; font-weight: 600; color: var(--gray-dark); }
.form-group .req { color: var(--red); }
.form-group .opt { font-weight: 400; color: var(--gray); font-size: 12px; }
.form-group input,
.form-group select,
.form-group textarea { padding: 10px 14px; border: 1.5px solid var(--border); border-radius: 8px; font-family: var(--font); font-size: 14px; outline: none; transition: border-color .18s, box-shadow .18s; background: var(--white); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(211,47,47,.1); }
.form-group textarea { min-height: 88px; resize: vertical; }
.form-hint { font-size: 12px; color: var(--gray); margin-top: 2px; }
.form-note { font-size: 13px; color: var(--gray); margin-bottom: 18px; }
hr.divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

/* ===== EMPTY STATE ===== */
.empty-state { text-align: center; padding: 56px 20px; color: var(--gray); }
.empty-state .es-icon { font-size: 52px; margin-bottom: 14px; }
.empty-state h3 { font-size: 18px; font-weight: 700; color: var(--gray-dark); margin-bottom: 8px; }
.empty-state p { font-size: 14px; }

/* ===== MODAL ===== */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 500; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-bg.open { display: flex; }
.modal { background: var(--white); border-radius: 14px; box-shadow: 0 24px 64px rgba(0,0,0,.3); padding: 32px; max-width: 580px; width: 100%; max-height: 92vh; overflow-y: auto; animation: slideUp .22s ease; }
@keyframes slideUp { from { transform: translateY(18px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 4px; }
.modal-title { font-size: 20px; font-weight: 800; }
.modal-close { background: none; border: none; font-size: 22px; cursor: pointer; color: var(--gray); padding: 0 4px; line-height: 1; }
.modal-close:hover { color: var(--red); }
.modal-sub { color: var(--red); font-size: 14px; font-weight: 600; margin-bottom: 20px; }

/* ===== ADMIN TABLE ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
.data-table { width: 100%; border-collapse: collapse; background: var(--white); font-size: 13.5px; }
.data-table th { background: var(--black); color: var(--white); padding: 12px 14px; text-align: left; font-size: 13px; font-weight: 600; white-space: nowrap; }
.data-table td { padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #fafafa; }
.data-table .actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* ===== STATUS BADGES ===== */
.status { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 700; white-space: nowrap; }
.status-pending  { background: #FFF9C4; color: #F57F17; }
.status-approved { background: var(--success-light); color: var(--success); }
.status-rejected { background: var(--red-light); color: #C62828; }

/* ===== ADMIN TABS ===== */
.admin-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.atab { padding: 9px 18px; border-radius: 20px; font-family: var(--font); font-size: 13.5px; font-weight: 600; cursor: pointer; border: 1.5px solid var(--border); background: var(--white); color: var(--gray-dark); transition: all .18s; }
.atab.active { background: var(--red); color: var(--white); border-color: var(--red); }
.atab:hover:not(.active) { border-color: var(--red); color: var(--red); }
.atab-section { display: none; }
.atab-section.active { display: block; }
.badge-count { display: inline-flex; align-items: center; justify-content: center; min-width: 20px; height: 20px; background: var(--red); color: var(--white); border-radius: 10px; font-size: 11px; font-weight: 700; margin-left: 5px; padding: 0 4px; }

/* ===== ADMIN COURSE CARD ===== */
.admin-course-card { background: var(--white); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 14px; box-shadow: var(--shadow); }
.acc-head { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.acc-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 5px 20px; font-size: 13.5px; color: var(--gray-dark); margin-bottom: 12px; }
.acc-meta span { display: flex; align-items: flex-start; gap: 6px; }
.acc-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.acc-note { display: flex; gap: 8px; align-items: flex-start; margin-top: 10px; }
.acc-note input { flex: 1; padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 6px; font-family: var(--font); font-size: 13px; }
.acc-note input:focus { border-color: var(--red); outline: none; }

/* ===== STAT CARDS ===== */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card { background: var(--white); border-radius: var(--radius); border: 1.5px solid var(--border); padding: 18px 20px; box-shadow: var(--shadow); }
.stat-num { font-size: 34px; font-weight: 800; color: var(--red); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 13px; color: var(--gray); font-weight: 500; }

/* ===== COURSE DETAIL ===== */
.course-detail { display: grid; grid-template-columns: 1fr 360px; gap: 24px; align-items: start; }
.detail-card { background: var(--white); border-radius: var(--radius); border: 1.5px solid var(--border); padding: 28px; box-shadow: var(--shadow); }
.detail-card h2 { font-size: 24px; font-weight: 800; margin-bottom: 4px; }
.detail-id { font-size: 13px; color: var(--gray); font-family: monospace; margin-bottom: 16px; }
.detail-info { margin-bottom: 20px; }
.detail-row { display: flex; gap: 10px; font-size: 14px; color: var(--gray-dark); margin-bottom: 10px; line-height: 1.45; }
.detail-row .ico { flex-shrink: 0; width: 20px; }
.detail-desc { font-size: 14.5px; line-height: 1.65; color: var(--gray-dark); border-top: 1px solid var(--border); padding-top: 16px; margin-top: 4px; }
.signup-box { background: var(--white); border-radius: var(--radius); border: 1.5px solid var(--border); padding: 24px; box-shadow: var(--shadow); }
.signup-box h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.signup-box .spots-info { font-size: 13px; color: var(--gray); margin-bottom: 18px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .course-detail { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .form-card { padding: 20px; }
  .modal { padding: 22px; }
  .header-sub { display: none; }
  .acc-meta { grid-template-columns: 1fr; }
  .data-table { font-size: 12.5px; }
  .data-table td, .data-table th { padding: 9px 10px; }
}

/* ===== EDIT PAGE EXTRAS ===== */
.acc-note input {
  width: 100%; padding: 9px 12px; border: 1.5px solid var(--border);
  border-radius: 8px; font-family: var(--font); font-size: 13.5px;
}
.acc-note input:focus { border-color: var(--red); outline: none; box-shadow: 0 0 0 3px rgba(211,47,47,.1); }