/* ==========================================================================
   Cổng sinh viên UTT — dvc.utt.edu.vn/sinh-vien/
   Kế thừa bảng màu nhận diện của Cổng dịch vụ trực tuyến.
   ========================================================================== */

:root {
    --navy: #262661;
    --navy-2: #3a3a86;
    --orange: #FB8401;
    --red: #AA1D2B;
    --green: #157a4b;
    --green-bg: #e6f7ee;
    --amber: #92640a;
    --amber-bg: #fff6e0;
    --danger: #b3261e;
    --danger-bg: #fdecea;
    --bg: #f5f6fa;
    --card: #fff;
    --line: #e9ebf1;
    --text: #333a4d;
    --muted: #8b90a0;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 8px 20px rgba(38, 38, 97, .10);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
}

a { color: var(--navy); }
a:hover { color: var(--orange); }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

/* ---------- Thanh đầu trang ---------- */
.sv-top {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%);
    color: #fff;
    padding: 14px 0;
}
.sv-top .wrap { display: flex; align-items: center; gap: 12px; }
.sv-top .brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: #fff; min-width: 0; }
.sv-top .brand img { height: 34px; width: auto; flex: 0 0 auto; }
.sv-top .brand b { display: block; font-size: 15px; line-height: 1.25; }
.sv-top .brand span { display: block; font-size: 11.5px; opacity: .75; letter-spacing: .4px; }
.sv-top .spacer { margin-left: auto; }
.sv-top .who { font-size: 13px; opacity: .9; display: none; }
@media (min-width: 700px) { .sv-top .who { display: block; } }

/* ---------- Nút ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 44px; padding: 10px 20px;
    border: 1px solid transparent; border-radius: 22px;
    font-size: 14.5px; font-weight: 600; text-decoration: none;
    cursor: pointer; transition: .15s; background: #fff; color: var(--navy);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--orange), #F26419); color: #fff; }
.btn-primary:hover { color: #fff; box-shadow: 0 6px 16px rgba(251, 132, 1, .35); }
.btn-outline { background: transparent; border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-outline:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--orange); color: var(--orange); }
.btn-sm { min-height: 38px; padding: 7px 15px; font-size: 13.5px; }
.btn-block { width: 100%; }

/* ---------- Trang chủ ---------- */
.hero {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%);
    color: #fff; padding: 44px 0 52px; text-align: center;
}
.hero h1 { margin: 0 0 10px; font-size: 26px; font-weight: 700; letter-spacing: .3px; }
.hero p { margin: 0 auto 24px; max-width: 560px; font-size: 15px; opacity: .88; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
@media (min-width: 700px) { .hero h1 { font-size: 33px; } }

/* ---------- Thẻ ---------- */
.grid { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 700px) { .grid.g2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 700px) { .grid.g3 { grid-template-columns: repeat(3, 1fr); } }

.card {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 20px;
}
.card h2 { margin: 0 0 4px; font-size: 17px; font-weight: 700; color: var(--navy); }
.card h3 { margin: 0 0 12px; font-size: 15.5px; font-weight: 700; color: var(--navy); }
.card p.sub { margin: 0 0 14px; font-size: 13.5px; color: var(--muted); }

.card-action { display: flex; gap: 13px; align-items: flex-start; text-decoration: none; color: inherit; }
.card-action:hover { border-color: var(--orange); text-decoration: none; color: inherit; }
.card-action .ico {
    width: 42px; height: 42px; flex: 0 0 42px; border-radius: 11px;
    background: linear-gradient(135deg, var(--orange), var(--red));
    color: #fff; display: flex; align-items: center; justify-content: center; font-size: 19px;
}
.card-action .t { font-size: 15px; font-weight: 700; color: var(--navy); margin-bottom: 2px; }
.card-action .d { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* ---------- Hồ sơ ---------- */
.profile { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.avatar {
    width: 64px; height: 64px; flex: 0 0 64px; border-radius: 50%;
    background: linear-gradient(135deg, var(--navy), var(--navy-2));
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 22px; font-weight: 700; letter-spacing: .5px;
}
.profile .nm { font-size: 19px; font-weight: 700; color: var(--navy); }
.profile .ms { font-size: 13.5px; color: var(--muted); }

dl.info { margin: 0; display: grid; grid-template-columns: 1fr; gap: 0; }
@media (min-width: 620px) { dl.info { grid-template-columns: 170px 1fr; } }
dl.info dt {
    font-size: 12px; font-weight: 700; color: var(--muted);
    text-transform: uppercase; letter-spacing: .5px;
    padding: 11px 0 2px; border-top: 1px solid var(--line);
}
dl.info dd {
    margin: 0; padding: 2px 0 11px; font-size: 14.5px; word-break: break-word;
}
@media (min-width: 620px) {
    dl.info dt { padding: 12px 0; }
    dl.info dd { padding: 12px 0; border-top: 1px solid var(--line); }
}
dl.info dt:first-of-type, dl.info dd:first-of-type { border-top: 0; }

/* ---------- Thông báo ---------- */
.alert {
    border-radius: var(--radius); padding: 13px 16px; margin: 0 0 16px;
    font-size: 14px; display: flex; gap: 10px; align-items: flex-start;
    border: 1px solid transparent;
}
.alert b { font-weight: 700; }
.alert-ok { background: var(--green-bg); color: var(--green); border-color: #bfe8d3; }
.alert-warn { background: var(--amber-bg); color: var(--amber); border-color: #f3ddad; }
.alert-err { background: var(--danger-bg); color: var(--danger); border-color: #f5c6c2; }
.alert-info { background: #eef1fb; color: var(--navy); border-color: #d5dbf3; }

/* ---------- Khối phụ ---------- */
.section { padding: 30px 0; }
.section > h2 {
    margin: 0 0 4px; font-size: 20px; font-weight: 700; color: var(--navy);
}
.section > p.lead { margin: 0 0 18px; color: var(--muted); font-size: 14px; }

.steps { margin: 0; padding-left: 20px; }
.steps li { margin-bottom: 8px; font-size: 14px; }

.help {
    background: linear-gradient(135deg, var(--orange) 0%, var(--red) 130%);
    color: #fff; border-radius: var(--radius); padding: 20px 22px;
    display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
}
.help h3 { margin: 0 0 3px; font-size: 16.5px; font-weight: 700; color: #fff; }
.help p { margin: 0; font-size: 13.5px; opacity: .92; }
.help .acts { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.help .acts a { background: #fff; color: var(--red); padding: 9px 16px; border-radius: 20px;
    font-size: 13.5px; font-weight: 700; text-decoration: none; white-space: nowrap; }
.help .acts a:hover { background: var(--navy); color: #fff; }

/* ---------- Chân trang ---------- */
.sv-foot {
    margin-top: 34px; padding: 22px 0 30px;
    border-top: 1px solid var(--line); text-align: center;
    font-size: 13px; color: var(--muted);
}
.sv-foot a { color: var(--muted); text-decoration: none; margin: 0 8px; }
.sv-foot a:hover { color: var(--orange); }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
    .btn:hover { transform: none; }
}

/* ===== Cập nhật v2: logo, nav, tra cứu email ===== */

/* Logo */
.sv-top .brand img {
    height: 42px; width: auto; flex: 0 0 auto;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,.25));
}

/* Nav trong header */
.sv-nav {
    display: flex; gap: 2px; margin-left: 18px; flex-wrap: nowrap;
}
.sv-nav a {
    color: rgba(255,255,255,.82); text-decoration: none; white-space: nowrap;
    font-size: 13.5px; font-weight: 600; padding: 6px 11px; border-radius: 8px;
    transition: background .15s, color .15s;
}
.sv-nav a:hover, .sv-nav a.active {
    background: rgba(255,255,255,.15); color: #fff; text-decoration: none;
}
@media (max-width: 820px) { .sv-nav { display: none; } }

/* Mục lục breadcrumb */
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb span { margin: 0 6px; }

/* Form tra cứu */
.lookup-box {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius-lg); padding: 28px 26px; margin-bottom: 18px;
}
.input-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.input-row input {
    flex: 1 1 220px; height: 46px; padding: 0 16px;
    border: 1px solid var(--line); border-radius: 10px;
    font-size: 15px; outline: none; transition: .2s;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    letter-spacing: .5px;
}
.input-row input:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(251,132,1,.12); }
.input-row input::placeholder { font-family: inherit; font-size: 14px; letter-spacing: 0; color: var(--muted); }
.input-row .btn { height: 46px; flex: 0 0 auto; border-radius: 10px; }

/* Bảng kết quả tra cứu */
.result-box {
    border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--line); display: none;
}
.result-box.show { display: block; }
.result-head {
    background: var(--navy); color: #fff; padding: 12px 16px;
    font-size: 13px; font-weight: 600; letter-spacing: .3px;
}
.result-body { padding: 18px 16px; }
.result-body .label { font-size: 11.5px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 4px; }
.result-body .value { font-size: 17px; font-weight: 700; color: var(--navy); margin-bottom: 14px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.result-body .value.big { font-size: 22px; }
.copy-btn {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
    padding: 5px 12px; font-size: 12.5px; font-weight: 600;
    cursor: pointer; color: var(--navy); transition: .15s;
}
.copy-btn:hover { border-color: var(--orange); color: var(--orange); }
.copied { color: var(--green) !important; border-color: var(--green) !important; }

/* Bước hướng dẫn */
.step-group { margin-bottom: 28px; }
.step-group h3 {
    display: flex; align-items: center; gap: 12px; margin: 0 0 14px;
    font-size: 17px; font-weight: 700; color: var(--navy);
}
.step-group h3 .step-no {
    width: 30px; height: 30px; flex: 0 0 30px; border-radius: 50%;
    background: linear-gradient(135deg, var(--orange), var(--red));
    color: #fff; font-size: 14px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.step-list { padding-left: 0; list-style: none; margin: 0; }
.step-list li {
    display: flex; gap: 12px; padding: 11px 0;
    border-top: 1px solid var(--line); font-size: 14px; line-height: 1.6;
}
.step-list li:first-child { border-top: 0; }
.step-list li .sn {
    min-width: 24px; height: 24px; border-radius: 50%; background: var(--navy);
    color: #fff; font-size: 11.5px; font-weight: 700;
    display: flex; align-items: center; justify-content: center; flex: 0 0 24px; margin-top: 1px;
}
.step-list li code {
    background: #f0f2f8; padding: 2px 7px; border-radius: 5px; font-size: 13px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--navy);
}

/* Tabs thiết bị */
.device-tabs { display: flex; gap: 6px; margin-bottom: 18px; border-bottom: 2px solid var(--line); }
.device-tabs button {
    padding: 9px 18px 11px; border: 0; background: transparent;
    font-size: 14.5px; font-weight: 600; color: var(--muted); cursor: pointer;
    border-bottom: 3px solid transparent; margin-bottom: -2px; transition: .15s;
}
.device-tabs button.active { color: var(--navy); border-bottom-color: var(--orange); }
.device-pane { display: none; }
.device-pane.active { display: block; }

/* Mẫu email */
.mail-pattern {
    background: linear-gradient(135deg,var(--navy),var(--navy-2));
    color: #fff; border-radius: var(--radius); padding: 16px 20px; text-align: center;
    font-size: 22px; font-weight: 700; letter-spacing: 1px; margin: 10px 0;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.mail-pattern em { color: var(--orange); font-style: normal; }

/* Info box màu */
.tip-box {
    border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px;
    font-size: 13.5px; line-height: 1.6; display: flex; gap: 10px;
}
.tip-box .ico { flex: 0 0 20px; font-size: 18px; }
.tip-ok  { background: var(--green-bg); color: #0d5c39; }
.tip-warn{ background: var(--amber-bg); color: var(--amber); }
.tip-info{ background: #eef1fb; color: var(--navy); }