/* =========================================================
   KM — คณะวิทยาศาสตร์และเทคโนโลยี มรภ.สงขลา
   สีหลักขององค์กร: เหลือง
   ========================================================= */
:root {
    --km-yellow: #f5b800;
    --km-yellow-600: #d99f00;
    --km-yellow-100: #fff6d6;
    --km-yellow-50: #fffbeb;
    --km-ink: #1f2430;
    --km-ink-soft: #4a5263;
    --km-muted: #7a8295;
    --km-line: #e8e3d4;
    --km-bg: #faf8f2;
    --km-card: #ffffff;
    --km-radius: 14px;
    --km-shadow: 0 1px 2px rgba(31, 36, 48, .05), 0 6px 20px rgba(31, 36, 48, .06);

    --bs-body-font-family: 'IBM Plex Sans Thai', system-ui, sans-serif;
    --bs-body-color: var(--km-ink);
    --bs-body-bg: var(--km-bg);
    --bs-link-color-rgb: 31, 36, 48;
    --bs-link-hover-color-rgb: 180, 120, 0;
    --bs-border-color: var(--km-line);
}

html { scroll-behavior: smooth; }
body { min-height: 100vh; display: flex; flex-direction: column; line-height: 1.65; }
h1, h2, h3, h4, h5, h6, .km-display { font-family: 'Mitr', 'IBM Plex Sans Thai', sans-serif; font-weight: 500; letter-spacing: -.005em; }
a { text-decoration: none; }
:focus-visible { outline: 3px solid var(--km-yellow); outline-offset: 2px; }

.km-skip { position: absolute; left: 1rem; top: 1rem; z-index: 2000; background: var(--km-ink); color: #fff; padding: .5rem 1rem; border-radius: 8px; }

/* ---------- ปุ่ม ---------- */
.btn-km {
    --bs-btn-bg: var(--km-yellow); --bs-btn-border-color: var(--km-yellow); --bs-btn-color: var(--km-ink);
    --bs-btn-hover-bg: var(--km-yellow-600); --bs-btn-hover-border-color: var(--km-yellow-600); --bs-btn-hover-color: var(--km-ink);
    --bs-btn-active-bg: var(--km-yellow-600); --bs-btn-active-border-color: var(--km-yellow-600); --bs-btn-active-color: var(--km-ink);
    font-weight: 600; border-radius: 10px;
}
.btn { border-radius: 10px; }
.btn-icon { width: 34px; height: 34px; padding: 0; display: inline-flex; align-items: center; justify-content: center; }

/* ---------- ส่วนหัว ---------- */
.km-topbar { background: #fff; border-bottom: 1px solid var(--km-line); }
.km-logo { height: 64px; width: auto; }
.km-site-title { font-family: 'Mitr', sans-serif; font-size: clamp(1.05rem, 2.4vw, 1.4rem); font-weight: 500; }
.km-site-sub { color: var(--km-muted); font-size: .85rem; }
.km-brand-mark { width: 38px; height: 38px; border-radius: 10px; background: var(--km-yellow); color: var(--km-ink); display: inline-flex; align-items: center; justify-content: center; font-size: 1.1rem; }
.km-brand-mark-lg { width: 64px; height: 64px; border-radius: 16px; font-size: 1.8rem; }

.km-navbar { background: var(--km-yellow); box-shadow: 0 2px 10px rgba(0, 0, 0, .06); }
.km-navbar .nav-link { color: var(--km-ink); font-weight: 500; padding: .8rem 1rem !important; border-radius: 0; position: relative; }
.km-navbar .nav-link:hover { background: rgba(255, 255, 255, .28); }
.km-navbar .nav-link.active { background: rgba(255, 255, 255, .5); }
.km-navbar .nav-link.active::after { content: ""; position: absolute; left: 1rem; right: 1rem; bottom: 0; height: 3px; background: var(--km-ink); border-radius: 3px 3px 0 0; }

/* ---------- Hero ---------- */
.km-hero {
    background:
        radial-gradient(circle at 85% 20%, rgba(245, 184, 0, .28), transparent 45%),
        radial-gradient(circle at 10% 90%, rgba(245, 184, 0, .14), transparent 40%),
        linear-gradient(180deg, var(--km-yellow-50), var(--km-bg));
    border-bottom: 1px solid var(--km-line);
}
.km-hero h1 { font-size: clamp(1.6rem, 3.6vw, 2.4rem); }
.km-hero .lead { color: var(--km-ink-soft); font-size: 1.05rem; max-width: 46rem; }
.km-stat { background: #fff; border: 1px solid var(--km-line); border-radius: var(--km-radius); padding: .9rem 1.1rem; display: flex; gap: .85rem; align-items: center; box-shadow: var(--km-shadow); height: 100%; }
.km-stat-icon { width: 44px; height: 44px; border-radius: 12px; background: var(--km-yellow-100); color: var(--km-yellow-600); display: flex; align-items: center; justify-content: center; font-size: 1.15rem; flex-shrink: 0; }
.km-stat-num { font-family: 'Mitr', sans-serif; font-size: 1.5rem; line-height: 1; font-weight: 500; }
.km-stat-label { color: var(--km-muted); font-size: .85rem; }

/* ---------- ค้นหา ---------- */
.km-search { position: relative; }
.km-search i { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--km-muted); }
.km-search .form-control { padding: .8rem 1rem .8rem 2.75rem; border-radius: 12px; border-color: var(--km-line); background: #fff; }
.km-search .form-control:focus { border-color: var(--km-yellow); box-shadow: 0 0 0 .25rem rgba(245, 184, 0, .2); }
.form-control:focus, .form-select:focus { border-color: var(--km-yellow); box-shadow: 0 0 0 .25rem rgba(245, 184, 0, .2); }

/* ---------- แท็บปีการศึกษา ---------- */
.km-years { display: flex; gap: .5rem; overflow-x: auto; padding-bottom: .35rem; scrollbar-width: thin; }
.km-years .nav-link { white-space: nowrap; border-radius: 999px; border: 1px solid var(--km-line); background: #fff; color: var(--km-ink-soft); font-weight: 500; padding: .45rem 1.1rem; }
.km-years .nav-link:hover { border-color: var(--km-yellow); color: var(--km-ink); }
.km-years .nav-link.active { background: var(--km-ink); border-color: var(--km-ink); color: #fff; }
.km-years .badge { background: var(--km-yellow-100); color: var(--km-ink); font-weight: 600; }
.km-years .nav-link.active .badge { background: var(--km-yellow); }

/* ---------- การ์ดหัวข้อ ---------- */
.km-card { background: var(--km-card); border: 1px solid var(--km-line); border-radius: var(--km-radius); box-shadow: var(--km-shadow); height: 100%; display: flex; flex-direction: column; transition: transform .15s ease, box-shadow .15s ease; }
.km-card:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(31, 36, 48, .06), 0 12px 28px rgba(31, 36, 48, .09); }
.km-card-head { padding: 1.1rem 1.25rem .9rem; border-bottom: 1px solid var(--km-line); }
.km-card-head h3 { font-size: 1.08rem; margin: .45rem 0 0; line-height: 1.45; }
.km-cat { display: inline-flex; align-items: center; gap: .35rem; font-size: .78rem; font-weight: 600; color: #8a5d00; background: var(--km-yellow-100); border-radius: 999px; padding: .2rem .7rem; }
.km-links { list-style: none; margin: 0; padding: .5rem; flex: 1; }
.km-link { display: flex; gap: .75rem; align-items: flex-start; padding: .6rem .75rem; border-radius: 10px; color: var(--km-ink); }
.km-link:hover { background: var(--km-yellow-50); color: var(--km-ink); }
.km-link-title { flex: 1; line-height: 1.5; }
.km-link-type { font-size: .72rem; color: var(--km-muted); display: block; }
.km-link .fa-arrow-up-right-from-square { color: var(--km-muted); font-size: .75rem; margin-top: .4rem; opacity: 0; transition: opacity .15s; }
.km-link:hover .fa-arrow-up-right-from-square { opacity: 1; }
.km-ficon { width: 32px; height: 32px; flex-shrink: 0; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; font-size: .95rem; }
.type-video { background: #fdecec; color: #d4202c; }
.type-pdf   { background: #fdeeea; color: #c8371d; }
.type-word  { background: #e8f0fd; color: #2b5cb8; }
.type-excel { background: #e6f5ec; color: #1d7a45; }
.type-ppt   { background: #fdf0e6; color: #c4561b; }
.type-drive { background: #e9f4ee; color: #188038; }
.type-zip   { background: #f1eefa; color: #6a4bb3; }
.type-image { background: #e8f6f8; color: #11808f; }
.type-link  { background: #eef0f4; color: #4a5263; }
.km-empty-links { color: var(--km-muted); padding: 1rem 1.25rem; font-size: .9rem; }

.km-empty { text-align: center; color: var(--km-muted); padding: 3rem 1rem; background: #fff; border: 1px dashed var(--km-line); border-radius: var(--km-radius); }
.km-empty i { font-size: 2.2rem; color: var(--km-yellow); margin-bottom: .75rem; }
mark.km-hl { background: var(--km-yellow-100); padding: 0 .1em; border-radius: 3px; }

/* ---------- ส่วนท้าย ---------- */
.km-footer { background: #1f2430; color: rgba(255, 255, 255, .78); font-size: .95rem; }
.km-footer a { color: rgba(255, 255, 255, .9); }
.km-footer a:hover { color: var(--km-yellow); }
.km-footer-title { font-size: 1.05rem; color: var(--km-yellow); margin-bottom: 1rem; }
.km-contact li { display: flex; gap: .75rem; margin-bottom: .6rem; }
.km-contact i { color: var(--km-yellow); width: 18px; margin-top: .3rem; text-align: center; }
.km-social { display: flex; gap: .85rem; align-items: center; padding: .6rem .75rem; border-radius: 12px; background: rgba(255, 255, 255, .05); }
.km-social:hover { background: rgba(255, 255, 255, .1); }
.km-social-icon { width: 40px; height: 40px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 1.1rem; flex-shrink: 0; }
.km-social-icon.fb { background: #1877f2; }
.km-social-icon.yt { background: #ff0000; }
.km-footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); color: rgba(255, 255, 255, .55); }

.km-to-top { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 1030; width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--km-yellow); color: var(--km-ink); box-shadow: 0 6px 18px rgba(0, 0, 0, .18); opacity: 0; pointer-events: none; transform: translateY(10px); transition: all .2s ease; }
.km-to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.km-to-top:hover { background: var(--km-yellow-600); }

/* ---------- ระบบหลังบ้าน ---------- */
.km-admin-bar { background: var(--km-yellow); }
.km-admin-bar .navbar-brand, .km-admin-bar .nav-link { color: var(--km-ink); }
.km-admin-bar .km-brand-mark { background: var(--km-ink); color: var(--km-yellow); }
.km-admin-bar .nav-link { font-weight: 500; border-radius: 8px; padding: .45rem .8rem !important; }
.km-admin-bar .nav-link:hover, .km-admin-bar .nav-link.active { background: rgba(255, 255, 255, .45); }
.km-page-head h1 { font-size: 1.55rem; margin: 0; }
.km-page-head p { color: var(--km-muted); margin: .2rem 0 0; }
.km-panel { background: #fff; border: 1px solid var(--km-line); border-radius: var(--km-radius); box-shadow: var(--km-shadow); }
.km-panel-head { padding: 1rem 1.25rem; border-bottom: 1px solid var(--km-line); display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.km-panel-head h2 { font-size: 1.05rem; margin: 0; }
.km-table { margin: 0; }
.km-table thead th { background: var(--km-yellow-50); color: var(--km-ink-soft); font-weight: 600; font-size: .85rem; border-bottom: 1px solid var(--km-line); padding: .8rem 1rem; white-space: nowrap; }
.km-table td { padding: .8rem 1rem; border-color: var(--km-line); }
.km-table tbody tr:hover td { background: #fffdf5; }
.km-year-pill { font-family: 'Mitr', sans-serif; background: var(--km-ink); color: #fff; border-radius: 8px; padding: .15rem .6rem; font-size: .9rem; }
.km-count { display: inline-flex; align-items: center; gap: .3rem; font-size: .85rem; color: var(--km-ink-soft); }
.km-alert { border-radius: 12px; }
.km-choice { border: 1px solid var(--km-line); border-radius: 12px; padding: 1rem; background: var(--km-bg); }
.km-choice-label { font-size: .75rem; font-weight: 700; letter-spacing: .03em; color: #8a5d00; text-transform: uppercase; }
.km-or { display: flex; align-items: center; gap: .75rem; color: var(--km-muted); font-size: .85rem; margin: .75rem 0; }
.km-or::before, .km-or::after { content: ""; flex: 1; height: 1px; background: var(--km-line); }
.km-drop { border: 2px dashed var(--km-line); border-radius: 12px; padding: 1.25rem; text-align: center; background: #fff; cursor: pointer; transition: border-color .15s, background .15s; }
.km-drop:hover, .km-drop.dragover { border-color: var(--km-yellow); background: var(--km-yellow-50); }
.km-drop input { display: none; }

/* ---------- ล็อกอิน ---------- */
.km-login-wrap { min-height: 100vh; display: grid; grid-template-columns: 1fr; }
@media (min-width: 992px) { .km-login-wrap { grid-template-columns: 1.1fr 1fr; } }
.km-login-art { display: none; background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, .35), transparent 40%), linear-gradient(135deg, var(--km-yellow), #f19a00); color: var(--km-ink); padding: 3rem; }
@media (min-width: 992px) { .km-login-art { display: flex; flex-direction: column; justify-content: space-between; } }
.km-login-art h1 { font-size: 2.2rem; }
.km-login-form { display: flex; align-items: center; justify-content: center; padding: 2rem 1.25rem; }
.km-login-card { width: 100%; max-width: 400px; }
.km-login-card .form-control { padding: .7rem .9rem; border-radius: 10px; }
.km-login-card .input-group .form-control { border-right: 0; }
.km-login-card .input-group .btn { border: 1px solid var(--bs-border-color); border-left: 0; background: #fff; border-radius: 0 10px 10px 0; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ---------- หน้าย่อยของเมนู ---------- */
.km-hero-sm h1 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
.km-hero-sm .lead { font-size: 1rem; }
.km-hero-icon { width: 56px; height: 56px; font-size: 1.4rem; background: var(--km-yellow); color: var(--km-ink); border-radius: 14px; }
.km-year-pill-sm { font-size: .78rem; padding: .1rem .5rem; align-self: center; flex-shrink: 0; }
.km-link-disabled { color: var(--km-muted); cursor: default; }
.km-link-disabled:hover { background: transparent; color: var(--km-muted); }

.km-steps { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); counter-reset: step; }
.km-step { background: #fff; border: 1px solid var(--km-line); border-radius: var(--km-radius); padding: 1.1rem 1rem; position: relative; box-shadow: var(--km-shadow); }
.km-step-num { font-family: 'Mitr', sans-serif; width: 32px; height: 32px; border-radius: 50%; background: var(--km-yellow); color: var(--km-ink); display: inline-flex; align-items: center; justify-content: center; font-weight: 600; margin-bottom: .6rem; }
.km-step h3 { font-size: .98rem; margin: 0 0 .25rem; }
.km-step p { font-size: .82rem; color: var(--km-muted); margin: 0; line-height: 1.5; }