/* ================================================================
   Khalifa University — UNESCO 2026 Water Challenge
   Full UI Stylesheet
   ================================================================ */

:root {
    --ku-navy:    #001b48;
    --ku-blue:    #0057a8;
    --ku-accent:  #0096c7;
    --ku-light:   #e8f4fd;
    --ku-grad:    linear-gradient(135deg, #001b48 0%, #0057a8 60%, #0096c7 100%);
    --ku-grad-h:  linear-gradient(135deg, #00245e 0%, #006ecf 60%, #00b4e8 100%);
    --card-radius: 12px;
    --shadow-sm:  0 2px 8px rgba(0,27,72,.08);
    --shadow-md:  0 4px 20px rgba(0,27,72,.12);
    --shadow-lg:  0 8px 40px rgba(0,27,72,.18);
}

/* ── Base ─────────────────────────────────────────────────────── */
html { font-size: 16px; position: relative; min-height: 100%; }

body {
    font-family: 'Inter', 'Open Sans', 'Segoe UI', Arial, sans-serif;
    background: #f0f4f8;
    color: #1a2540;
    padding-top: 64px;
    padding-bottom: 56px;
}

/* ── Navbar ───────────────────────────────────────────────────── */
.ku-navbar {
    background: var(--ku-navy);
    box-shadow: 0 2px 16px rgba(0,0,0,.3);
    padding: 0 0;
    min-height: 60px;
}

.ku-logo { max-height: 70px; max-width: 200px; }

.ku-heading {
    color: rgba(255,255,255,.92);
    font-size: 13.5px;
    font-weight: 500;
    letter-spacing: .2px;
    padding: 0 8px;
}

.ku-toggler {
    color: #fff;
    font-size: 24px;
    padding: 4px 8px;
}

.ku-toggler:focus { box-shadow: none; }

/* ── Footer ───────────────────────────────────────────────────── */
.ku-footer {
    position: fixed;
    left: 0; bottom: 0; width: 100%;
    background: var(--ku-navy);
    color: rgba(255,255,255,.8);
    font-size: 11.5px;
    padding: 8px 0;
    z-index: 1000;
}

/* ── Page wrapper ─────────────────────────────────────────────── */
.page-wrapper { min-height: calc(100vh - 120px); }

/* ── Hero Banner ──────────────────────────────────────────────── */
.reg-hero {
    background: var(--ku-grad);
    color: #fff;
    padding: 40px 0 36px;
    margin-bottom: 0;
    position: relative;
    overflow: hidden;
}

.reg-hero::before {
    content: '';
    position: absolute;
    top: -60px; right: -60px;
    width: 320px; height: 320px;
    background: rgba(255,255,255,.04);
    border-radius: 50%;
}

.reg-hero::after {
    content: '';
    position: absolute;
    bottom: -80px; left: -40px;
    width: 240px; height: 240px;
    background: rgba(255,255,255,.03);
    border-radius: 50%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.25);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .8px;
    text-transform: uppercase;
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 14px;
}

.hero-title {
    font-size: clamp(22px, 4vw, 34px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 10px;
}

.hero-sub {
    font-size: 15px;
    color: rgba(255,255,255,.8);
    margin-bottom: 20px;
    max-width: 560px;
}

.hero-deadline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.2);
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
}
.hero-event-link {
    display: inline-block;
    margin-top: 0.6rem;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    border-bottom: 1px dashed rgba(255,255,255,0.5);
}
.hero-event-link:hover {
    color: #fff;
    border-bottom-color: #fff;
}

.hero-icon-wrap {
    font-size: 80px;
    opacity: .25;
    text-align: center;
    line-height: 1;
}

/* ── Step Tracker ─────────────────────────────────────────────── */
.step-track-wrap {
    background: #fff;
    border-bottom: 1px solid #dde3ec;
    padding: 0;
    position: sticky;
    top: 60px;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,27,72,.06);
}

.step-track {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 0 8px;
}

.step-track::-webkit-scrollbar { display: none; }

.step-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    font-size: 13px;
    font-weight: 500;
    color: #94a3b8;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    cursor: default;
    transition: color .2s;
    text-decoration: none;
}

.step-item.active {
    color: var(--ku-navy);
    border-bottom-color: var(--ku-accent);
    font-weight: 600;
}

.step-num {
    width: 24px; height: 24px;
    border-radius: 50%;
    background: #e2e8f0;
    color: #64748b;
    font-size: 12px;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}

.step-item.active .step-num {
    background: var(--ku-accent);
    color: #fff;
}

/* ── Form container ───────────────────────────────────────────── */
.form-wrap { padding: 28px 0 40px; }

/* ── Section cards ────────────────────────────────────────────── */
.sec-card {
    background: #fff;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    transition: box-shadow .2s;
}

.sec-card:hover { box-shadow: var(--shadow-md); }

.sec-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 24px;
    background: linear-gradient(90deg, #f8faff 0%, #fff 100%);
    border-bottom: 1px solid #e8edf5;
}

.sec-num {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--ku-grad);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0,86,168,.3);
}

.sec-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--ku-navy);
    margin: 0;
}

.sec-subtitle {
    font-size: 12px;
    color: #64748b;
    margin: 2px 0 0;
}

.sec-body { padding: 24px; }

/* ── Floating labels ──────────────────────────────────────────── */
.form-floating > .form-control,
.form-floating > .form-select {
    border-color: #d1d9e6;
    border-radius: 8px;
    font-size: 15px;
    background: #f8faff;
    transition: border-color .2s, box-shadow .2s, background .2s;
}

.form-floating > .form-control:focus,
.form-floating > .form-select:focus {
    border-color: var(--ku-accent);
    box-shadow: 0 0 0 3px rgba(0,150,199,.12);
    background: #fff;
}

.form-floating > label {
    color: #64748b;
    font-size: 14px;
}

.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-control:focus ~ label,
.form-floating > .form-select ~ label {
    color: var(--ku-blue);
    font-weight: 500;
}

.req-star { color: #e53e3e; font-size: 12px; }

/* ── Theme selection cards ────────────────────────────────────── */
.themes-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--ku-navy);
    margin-bottom: 12px;
    display: block;
}

.theme-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

@media (max-width: 575px) { .theme-grid { grid-template-columns: 1fr; } }

.theme-card-lbl {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px;
    border: 2px solid #dde3ec;
    border-radius: 10px;
    cursor: pointer;
    background: #fafbff;
    transition: border-color .2s, background .2s, box-shadow .2s;
    user-select: none;
    position: relative;
}

.theme-card-lbl:hover {
    border-color: var(--ku-accent);
    background: #f0f8fd;
    box-shadow: 0 2px 10px rgba(0,150,199,.1);
}

.theme-card-lbl input[type="radio"] { position: absolute; opacity: 0; width: 0; height: 0; }

.theme-card-lbl.selected {
    border-color: var(--ku-accent);
    background: #e8f6fb;
    box-shadow: 0 2px 12px rgba(0,150,199,.18);
}

.theme-icon {
    font-size: 26px;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--ku-accent);
}

.theme-text { font-size: 13.5px; font-weight: 500; color: #1a2540; line-height: 1.4; }

.theme-check {
    position: absolute;
    top: 10px; right: 12px;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--ku-accent);
    color: #fff;
    font-size: 11px;
    display: none;
    align-items: center;
    justify-content: center;
}

.theme-card-lbl.selected .theme-check { display: flex; }

/* ── Person cards (members, advisors, mentors) ────────────────── */
.person-card {
    background: #f8faff;
    border: 1px solid #e0e8f4;
    border-radius: 10px;
    margin-bottom: 14px;
    overflow: hidden;
    transition: box-shadow .2s;
}

.person-card:hover { box-shadow: var(--shadow-sm); }

.person-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: linear-gradient(90deg, var(--ku-navy) 0%, var(--ku-blue) 100%);
    color: #fff;
}

.person-card-header.advisor {
    background: linear-gradient(90deg, #065f46 0%, #059669 100%);
}

.person-card-header.mentor {
    background: linear-gradient(90deg, #7c2d12 0%, #c2410c 100%);
}

.person-card-header .p-label {
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.person-card-body { padding: 16px; }

.btn-rm {
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.3);
    color: #fff;
    font-size: 13px;
    padding: 3px 10px;
    border-radius: 6px;
    transition: background .2s;
}

.btn-rm:hover { background: rgba(255,255,255,.28); color: #fff; }

/* ── Add person buttons ───────────────────────────────────────── */
.btn-add {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 2px dashed #b0bfd4;
    background: transparent;
    color: #4a6080;
    font-size: 13.5px;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 8px;
    width: 100%;
    justify-content: center;
    transition: border-color .2s, color .2s, background .2s;
    margin-top: 6px;
}

.btn-add:hover {
    border-color: var(--ku-accent);
    color: var(--ku-blue);
    background: #f0f8fd;
}

/* ── Submit section ───────────────────────────────────────────── */
.submit-bar {
    background: #fff;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e2e8f0;
    padding: 24px;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.submit-bar .submit-note {
    font-size: 13px;
    color: #64748b;
}

.btn-submit {
    background: var(--ku-grad);
    border: none;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 13px 40px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 16px rgba(0,86,168,.35);
    transition: background .2s, box-shadow .2s, transform .15s;
    white-space: nowrap;
}

.btn-submit:hover {
    background: var(--ku-grad-h);
    box-shadow: 0 6px 22px rgba(0,86,168,.45);
    transform: translateY(-1px);
    color: #fff;
}

.btn-submit:active { transform: translateY(0); }

.btn-submit:disabled {
    opacity: .7;
    cursor: not-allowed;
    transform: none;
}

/* ── Validation error summary ─────────────────────────────────── */
.alert-validation {
    border-left: 4px solid #dc3545;
    border-radius: 8px;
    background: #fff5f5;
}

.field-error { font-size: 12px; color: #dc3545; margin-top: 4px; }

/* Show invalid-feedback regardless of .was-validated (server-side only) */
.is-invalid ~ .invalid-feedback,
.is-invalid ~ .invalid-feedback,
.form-floating .invalid-feedback { display: block; font-size: 12px; }
.form-floating .is-invalid { border-color: #dc3545 !important; }
.form-floating .is-invalid:focus { box-shadow: 0 0 0 3px rgba(220,53,69,.18) !important; }

/* ── Confirmation page ────────────────────────────────────────── */
.confirm-wrapper {
    max-width: 680px;
    margin: 40px auto;
}

.confirm-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.confirm-hero {
    background: var(--ku-grad);
    padding: 40px 32px 32px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.confirm-hero::before {
    content: '';
    position: absolute;
    top: -40px; right: -40px;
    width: 200px; height: 200px;
    background: rgba(255,255,255,.05);
    border-radius: 50%;
}

.confirm-check {
    width: 72px; height: 72px;
    background: rgba(255,255,255,.2);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    margin-bottom: 16px;
    border: 2px solid rgba(255,255,255,.3);
}

.confirm-hero h2 { color: #fff; font-size: 24px; font-weight: 700; margin: 0 0 6px; }
.confirm-hero p { color: rgba(255,255,255,.8); font-size: 14px; margin: 0; }

.confirm-body { padding: 32px; }

.reg-num-box {
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f4fd 100%);
    border: 2px solid var(--ku-accent);
    border-radius: 12px;
    text-align: center;
    padding: 20px;
    margin-bottom: 28px;
}

.reg-num-box .rn-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--ku-blue);
    font-weight: 700;
}

.reg-num-box .rn-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--ku-navy);
    letter-spacing: 3px;
    font-family: 'Inter', monospace;
    margin-top: 6px;
}

.detail-row {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid #f0f4f8;
    align-items: flex-start;
}

.detail-row:last-of-type { border-bottom: none; }

.detail-icon { color: var(--ku-accent); font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.detail-label { font-size: 12px; color: #94a3b8; text-transform: uppercase; letter-spacing: .5px; }
.detail-value { font-size: 15px; font-weight: 600; color: var(--ku-navy); margin-top: 2px; }

.notice-box {
    background: #f0f8fd;
    border-left: 4px solid var(--ku-accent);
    border-radius: 8px;
    padding: 14px 16px;
    font-size: 13.5px;
    color: #1a2540;
    margin-top: 24px;
    display: flex;
    gap: 10px;
}

/* ── Report / Login ───────────────────────────────────────────── */
.login-wrap {
    min-height: calc(100vh - 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-top {
    background: var(--ku-grad);
    padding: 32px 28px 28px;
    text-align: center;
}

.login-top .lock-icon {
    font-size: 40px;
    color: rgba(255,255,255,.8);
    margin-bottom: 10px;
    display: block;
}

.login-top h4 { color: #fff; font-size: 20px; font-weight: 700; margin: 0 0 4px; }
.login-top p { color: rgba(255,255,255,.7); font-size: 13px; margin: 0; }

.login-form { padding: 28px; }

/* ── Report table ─────────────────────────────────────────────── */
.report-header {
    background: #fff;
    border-radius: var(--card-radius);
    padding: 20px 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 16px;
}

.stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--ku-navy);
    color: #fff;
    border-radius: 20px;
    padding: 5px 14px;
    font-size: 13px;
    font-weight: 600;
    margin: 3px;
}

/* ── Misc ─────────────────────────────────────────────────────── */
.font-12 { font-size: 12px; }

.btn-ku {
    background: var(--ku-grad);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
}

.btn-ku:hover, .btn-ku:focus {
    background: var(--ku-grad-h);
    color: #fff;
}

/* ── Focus styles ─────────────────────────────────────────────── */
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(0,150,199,.15);
    border-color: var(--ku-accent);
}

/* ── Mobile tweaks ────────────────────────────────────────────── */
@media (max-width: 576px) {
    .sec-body { padding: 16px; }
    .sec-header { padding: 14px 16px; }
    .submit-bar { flex-direction: column; text-align: center; }
    .btn-submit { width: 100%; justify-content: center; }
    .confirm-body { padding: 20px; }
    .confirm-hero { padding: 28px 20px 24px; }
    .reg-num-box .rn-value { font-size: 24px; letter-spacing: 2px; }
}