/* =====================================================================
   ไฟล์: assets/css/style.css
   สไตล์หลักของ TeachHub PT — โทนน้ำเงินกรมท่า + ส้ม
   สีหลักกำหนดผ่านตัวแปร --th-primary / --th-accent (ตั้งค่าได้จากระบบ)
   ===================================================================== */

:root {
    --th-primary: #1b2a4e;
    --th-accent: #f47b20;
    --th-bg: #f4f6fb;
    --th-text: #1f2937;
    --th-muted: #6b7280;
    --th-radius: 14px;
    --th-shadow: 0 6px 24px rgba(27, 42, 78, .08);
}

html, body {
    font-family: 'Sarabun', system-ui, -apple-system, 'Segoe UI', sans-serif;
    color: var(--th-text);
    background: var(--th-bg);
}

a { color: var(--th-primary); }
a:hover { color: var(--th-accent); }

/* ---------- ปุ่มตามธีม ---------- */
.btn-primary {
    --bs-btn-bg: var(--th-primary);
    --bs-btn-border-color: var(--th-primary);
    --bs-btn-hover-bg: #12203d;
    --bs-btn-hover-border-color: #12203d;
    --bs-btn-active-bg: #0e1930;
    --bs-btn-active-border-color: #0e1930;
}
.btn-accent {
    background: var(--th-accent);
    border-color: var(--th-accent);
    color: #fff;
}
.btn-accent:hover, .btn-accent:focus {
    background: #d9650f;
    border-color: #d9650f;
    color: #fff;
}
.text-primary-th { color: var(--th-primary) !important; }
.text-accent { color: var(--th-accent) !important; }
.bg-primary-th { background: var(--th-primary) !important; color: #fff; }
.bg-accent { background: var(--th-accent) !important; color: #fff; }

.form-control:focus, .form-select:focus {
    border-color: var(--th-accent);
    box-shadow: 0 0 0 .2rem rgba(244, 123, 32, .2);
}

/* ---------- ป้ายสถานะงาน ---------- */
.badge-status { font-weight: 500; padding: .4em .7em; border-radius: 20px; }
.badge-pending  { background: #ffc107; color: #3d2f00; }   /* รอตรวจ = เหลือง */
.badge-approved { background: #198754; color: #fff; }      /* ผ่าน = เขียว */
.badge-revision { background: #dc3545; color: #fff; }      /* ให้แก้ไข = แดง */
.badge-late     { background: #fd7e14; color: #fff; }      /* ส่งช้า = ส้ม */
.badge-none     { background: #adb5bd; color: #fff; }      /* ยังไม่ส่ง = เทา */

/* =====================================================================
   หน้ากลุ่มยืนยันตัวตน (login / register / forgot / change password)
   ===================================================================== */
.auth-body { min-height: 100vh; background: var(--th-bg); }

.auth-wrapper {
    display: flex;
    min-height: 100vh;
}

.auth-brand {
    flex: 0 0 42%;
    background:
        radial-gradient(circle at 15% 20%, rgba(244, 123, 32, .35), transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(255, 255, 255, .08), transparent 40%),
        linear-gradient(160deg, var(--th-primary) 0%, #0e1930 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem 2.5rem;
    position: relative;
    overflow: hidden;
}
.auth-brand::after {
    content: '';
    position: absolute;
    bottom: -80px; right: -80px;
    width: 260px; height: 260px;
    border: 40px solid rgba(244, 123, 32, .18);
    border-radius: 50%;
}
.auth-brand-inner { color: #fff; text-align: center; z-index: 1; }
.auth-brand-inner:hover { color: #fff; }
.auth-logo {
    width: 110px; height: 110px;
    object-fit: contain;
    background: #fff;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, .25);
    margin-bottom: 1rem;
}
.auth-college { font-size: 1.05rem; opacity: .85; }
.auth-system {
    font-size: 2.6rem;
    font-weight: 700;
    margin: .25rem 0;
    letter-spacing: .5px;
}
.auth-system::after {
    content: '';
    display: block;
    width: 60px; height: 4px;
    background: var(--th-accent);
    border-radius: 4px;
    margin: .5rem auto 0;
}
.auth-fullname { font-size: 1.05rem; opacity: .9; margin-top: .5rem; }
.auth-slogan {
    margin-top: 1rem;
    font-size: 1.15rem;
    color: #ffd2ad;
    font-weight: 500;
}
.auth-features {
    list-style: none;
    padding: 0;
    margin: 2.5rem 0 0;
    z-index: 1;
}
.auth-features li {
    padding: .45rem 0;
    opacity: .9;
}
.auth-features i {
    color: var(--th-accent);
    margin-right: .5rem;
    font-size: 1.1rem;
}

.auth-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}
.auth-card {
    width: 100%;
    max-width: 440px;
    background: #fff;
    border-radius: var(--th-radius);
    box-shadow: var(--th-shadow);
    padding: 2.25rem 2rem;
    border-top: 5px solid var(--th-accent);
}
.auth-card-wide { max-width: 760px; }
.auth-title {
    font-weight: 700;
    color: var(--th-primary);
    margin-bottom: .25rem;
}
.auth-subtitle { color: var(--th-muted); margin-bottom: 1.5rem; }
.auth-footer {
    margin-top: 1.5rem;
    font-size: .85rem;
    color: var(--th-muted);
    text-align: center;
}
.input-group-text { background: #f8f9fc; }
.toggle-password { cursor: pointer; }

.pw-strength { height: 6px; border-radius: 6px; background: #e5e7eb; overflow: hidden; }
.pw-strength > div { height: 100%; width: 0; transition: width .25s, background .25s; }

/* =====================================================================
   หลังบ้าน: Layout + Sidebar + Topbar
   ===================================================================== */
.app-body { background: var(--th-bg); }
.app-layout { display: flex; min-height: 100vh; }

.app-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--th-primary) 0%, #111c36 100%);
    color: #cfd6e6;
    display: flex;
    flex-direction: column;
}
@media (min-width: 992px) {
    .app-sidebar {
        position: sticky;
        top: 0;
        height: 100vh;
        overflow-y: auto;
    }
}
@media (max-width: 991.98px) {
    .app-sidebar.offcanvas-lg { width: 270px; background: linear-gradient(180deg, var(--th-primary) 0%, #111c36 100%); }
}
.sidebar-brand {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: 1.1rem 1.1rem;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.sidebar-logo {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: #fff;
    padding: 4px;
    object-fit: contain;
}
.sidebar-title { color: #fff; font-weight: 700; font-size: 1.15rem; }
.sidebar-sub { color: #ffb37a; font-size: .78rem; }
.sidebar-nav { padding: .75rem .6rem 1rem; flex: 1; }
.sidebar-heading {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: rgba(255, 255, 255, .45);
    margin: 1rem .75rem .35rem;
}
.sidebar-link {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: .55rem .8rem;
    border-radius: 10px;
    color: #d7deec;
    text-decoration: none;
    font-size: .95rem;
    margin-bottom: 2px;
    transition: background .15s, color .15s;
}
.sidebar-link i { font-size: 1.05rem; width: 1.2rem; text-align: center; }
.sidebar-link:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.sidebar-link.active {
    background: var(--th-accent);
    color: #fff;
    box-shadow: 0 4px 14px rgba(244, 123, 32, .35);
}
.sidebar-link.disabled { opacity: .45; cursor: not-allowed; }
.sidebar-link.disabled:hover { background: transparent; color: #d7deec; }
.sidebar-footer {
    font-size: .75rem;
    padding: .9rem 1.1rem;
    border-top: 1px solid rgba(255, 255, 255, .08);
    color: rgba(255, 255, 255, .55);
}

.app-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.app-topbar {
    display: flex;
    align-items: center;
    background: #fff;
    padding: .65rem 1.5rem;
    border-bottom: 1px solid #e7eaf2;
    position: sticky;
    top: 0;
    z-index: 1020;
}
.app-content { padding: 1.5rem; flex: 1; }
.app-footer {
    padding: 1rem 1.5rem;
    font-size: .85rem;
    color: var(--th-muted);
    border-top: 1px solid #e7eaf2;
    background: #fff;
}
@media (max-width: 575.98px) {
    .app-content { padding: 1rem; }
    .app-topbar { padding: .6rem 1rem; }
}

.avatar-sm { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; border: 2px solid #eef1f7; }
.avatar-md { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; }
.avatar-lg { width: 130px; height: 130px; border-radius: 50%; object-fit: cover; border: 4px solid #fff; box-shadow: var(--th-shadow); }

.page-title { font-size: 1.5rem; font-weight: 700; color: var(--th-primary); margin: 0; }
.breadcrumb { --bs-breadcrumb-divider: '›'; }

/* ---------- การ์ด ---------- */
.card {
    border: 0;
    border-radius: var(--th-radius);
    box-shadow: var(--th-shadow);
}
.card-header {
    background: #fff;
    border-bottom: 1px solid #eef1f7;
    font-weight: 600;
    color: var(--th-primary);
    border-radius: var(--th-radius) var(--th-radius) 0 0 !important;
    padding: .9rem 1.25rem;
}

/* การ์ดสรุปตัวเลข */
.stat-card {
    position: relative;
    overflow: hidden;
    padding: 1.15rem 1.25rem;
    border-radius: var(--th-radius);
    background: #fff;
    box-shadow: var(--th-shadow);
    height: 100%;
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: inherit;
    transition: transform .15s;
}
a.stat-card:hover { transform: translateY(-3px); color: inherit; }
.stat-icon {
    width: 54px; height: 54px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}
.stat-value { font-size: 1.75rem; font-weight: 700; line-height: 1.1; color: var(--th-primary); }
.stat-label { color: var(--th-muted); font-size: .9rem; }
.stat-sub { font-size: .8rem; color: var(--th-muted); }
.ic-navy   { background: rgba(27, 42, 78, .1);  color: var(--th-primary); }
.ic-orange { background: rgba(244, 123, 32, .14); color: var(--th-accent); }
.ic-green  { background: rgba(25, 135, 84, .12);  color: #198754; }
.ic-yellow { background: rgba(255, 193, 7, .18);  color: #b58500; }
.ic-red    { background: rgba(220, 53, 69, .12);  color: #dc3545; }
.ic-blue   { background: rgba(13, 110, 253, .1);  color: #0d6efd; }
.ic-purple { background: rgba(111, 66, 193, .12); color: #6f42c1; }

/* รายการงานใกล้ปิด */
.deadline-item {
    display: flex;
    align-items: center;
    gap: .9rem;
    padding: .85rem 1.25rem;
    border-bottom: 1px solid #f0f2f7;
}
.deadline-item:last-child { border-bottom: 0; }
.deadline-item.urgent { background: #fff5f5; border-left: 4px solid #dc3545; }
.deadline-icon {
    width: 42px; height: 42px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem; flex-shrink: 0;
}
.countdown-box { font-variant-numeric: tabular-nums; white-space: nowrap; }

.chart-box { position: relative; height: 300px; }
.chart-box-sm { position: relative; height: 240px; }

.table > :not(caption) > * > * { vertical-align: middle; }
.table thead th { background: #f6f8fc; color: var(--th-primary); font-weight: 600; white-space: nowrap; }
.empty-state { text-align: center; padding: 2rem 1rem; color: var(--th-muted); }
.empty-state i { font-size: 2.5rem; display: block; margin-bottom: .5rem; opacity: .5; }

.progress-thin { height: 8px; border-radius: 8px; }

/* =====================================================================
   หน้าบ้าน (Public)
   ===================================================================== */
.pub-navbar {
    background: var(--th-primary);
    box-shadow: 0 2px 12px rgba(0, 0, 0, .15);
}
.pub-navbar .navbar-brand img { width: 40px; height: 40px; border-radius: 50%; background: #fff; padding: 3px; }
.pub-navbar .nav-link { color: rgba(255, 255, 255, .85); }
.pub-navbar .nav-link:hover, .pub-navbar .nav-link.active { color: #fff; }
.pub-navbar .nav-link.active { box-shadow: inset 0 -3px 0 var(--th-accent); }

.hero {
    background:
        radial-gradient(circle at 10% 10%, rgba(244, 123, 32, .35), transparent 35%),
        radial-gradient(circle at 90% 90%, rgba(255, 255, 255, .07), transparent 40%),
        linear-gradient(150deg, var(--th-primary) 0%, #0e1930 100%);
    color: #fff;
    padding: 4rem 0 5.5rem;
    position: relative;
    overflow: hidden;
}
.hero-logo {
    width: 120px; height: 120px;
    border-radius: 50%;
    background: #fff;
    padding: 10px;
    object-fit: contain;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
}
.hero h1 { font-size: 3rem; font-weight: 700; }
.hero .slogan { color: #ffd2ad; font-size: 1.35rem; font-weight: 500; }
.hero-stats { margin-top: -3.5rem; position: relative; z-index: 2; }
@media (max-width: 767.98px) {
    .hero { padding: 2.5rem 0 4.5rem; text-align: center; }
    .hero h1 { font-size: 2.2rem; }
    .hero-logo { width: 90px; height: 90px; }
}
.section-title {
    font-weight: 700;
    color: var(--th-primary);
    position: relative;
    padding-left: .9rem;
    margin-bottom: 1.25rem;
}
.section-title::before {
    content: '';
    position: absolute;
    left: 0; top: .2em; bottom: .2em;
    width: 5px;
    border-radius: 4px;
    background: var(--th-accent);
}
.news-item { padding: 1rem 1.25rem; border-bottom: 1px solid #f0f2f7; display: block; color: inherit; text-decoration: none; }
.news-item:last-child { border-bottom: 0; }
.news-item:hover { background: #fafbfe; color: inherit; }
.news-title { font-weight: 600; color: var(--th-primary); }
.round-card { border-top: 4px solid var(--th-accent); }
.round-card.urgent { border-top-color: #dc3545; }
.round-card.upcoming { border-top-color: #0dcaf0; }
.round-card.closed { border-top-color: #6c757d; }

/* ปฏิทินรายเดือน */
.cal-table { table-layout: fixed; }
.cal-table th { text-align: center; background: var(--th-primary) !important; color: #fff !important; }
.cal-table td { height: 105px; vertical-align: top !important; padding: .35rem !important; font-size: .82rem; }
.cal-table td.other-month { background: #f8f9fb; color: #b5bccb; }
.cal-table td.today { background: #fff8f1; box-shadow: inset 0 0 0 2px var(--th-accent); }
.cal-day { font-weight: 600; }
.cal-event {
    display: block;
    border-radius: 6px;
    padding: 1px 5px;
    margin-top: 3px;
    font-size: .74rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #fff;
}
.cal-event.open { background: #198754; }
.cal-event.close { background: #dc3545; }
@media (max-width: 767.98px) {
    .cal-table td { height: 64px; font-size: .7rem; }
    .cal-event { font-size: .62rem; padding: 0 3px; }
}

.pub-footer { background: #0e1930; color: rgba(255, 255, 255, .7); padding: 2rem 0 1.25rem; font-size: .9rem; }
.pub-footer a { color: #ffb37a; }

/* การพิมพ์ */
@media print {
    .app-sidebar, .app-topbar, .app-footer, .no-print, .pub-navbar, .pub-footer { display: none !important; }
    .app-content { padding: 0; }
    .dt-length, .dt-search, .dt-paging, .dt-info, .page-head .ms-auto { display: none !important; }
    .stat-card { box-shadow: none; border: 1px solid #ddd; }
    .chart-box { height: 260px; }
    .card { box-shadow: none; border: 1px solid #ddd; }
    body { background: #fff; }
}

/* มือถือ: ย่อส่วนแบรนด์ไว้ด้านบน */
@media (max-width: 991.98px) {
    .auth-wrapper { flex-direction: column; }
    .auth-brand { flex: none; padding: 2rem 1rem 2.5rem; }
    .auth-logo { width: 80px; height: 80px; }
    .auth-system { font-size: 2rem; }
    .auth-main { justify-content: flex-start; margin-top: -1.5rem; }
    .auth-card { padding: 1.75rem 1.25rem; }
}

.pub-navbar .nav-link, .pub-navbar .btn { white-space: nowrap; }

/* ผู้ใช้ออนไลน์ / ข้อความชื่นชม (v1.20) */
.online-dot { width: 10px; height: 10px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 3px rgba(34, 197, 94, .25); flex-shrink: 0; }
.cheer-card { border-left: 4px solid var(--th-accent); }
.cheer-card .cheer-icon { font-size: 2rem; color: var(--th-accent); }