*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --blue: #1a56a0;
    --blue-light: #e8f0fb;
    --blue-mid: #3578d4;
    --blue-dark: #0d3570;
    --accent: #f0a500;
    --accent-light: #fff8e6;
    --white: #ffffff;
    --gray-100: #f5f6fa;
    --gray-200: #e8eaf0;
    --gray-400: #9aa0b4;
    --gray-700: #3a3f5c;
    --text: #1a1f3a;
    --green: #1a7a4a;
    --green-light: #e6f7ee;
    --red: #b02020;
    --red-light: #fdeaea;
    --shadow: 0 4px 24px rgba(26, 86, 160, 0.10);
    --radius: 14px;
    --radius-sm: 8px;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--gray-100);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

/* NAV */
nav {
    background: var(--blue-dark);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    height: 60px;
}

.nav-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem;
    color: var(--white);
    font-weight: 700;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.nav-logo span {
    background: var(--accent);
    color: var(--blue-dark);
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'DM Sans', sans-serif;
}

.nav-links {
    display: flex;
    gap: 4px;
    list-style: none;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.82);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    padding: 6px 13px;
    border-radius: var(--radius-sm);
    transition: background 0.18s, color 0.18s;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    margin: 5px 0;
    border-radius: 2px;
    transition: 0.3s;
}

/* HERO */
.hero {
    background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 60%, var(--blue-mid) 100%);
    padding: 60px 1.5rem 50px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -80px;
    width: 320px;
    height: 320px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -60px;
    width: 260px;
    height: 260px;
    background: rgba(240, 165, 0, 0.07);
    border-radius: 50%;
}

.hero-badge {
    display: inline-block;
    background: var(--accent);
    color: var(--blue-dark);
    font-weight: 700;
    font-size: 0.78rem;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 1px;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.2;
}

.hero p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 560px;
    margin: 0 auto 24px;
}

.hero-tags {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-tag {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.82rem;
    padding: 5px 14px;
    border-radius: 20px;
}

/* MAIN */
main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 3rem;
}

.section-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--blue-mid);
    margin-bottom: 6px;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    color: var(--blue-dark);
    margin-bottom: 20px;
    font-weight: 700;
}

.section-divider {
    width: 40px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    margin-bottom: 24px;
}

section {
    margin-bottom: 50px;
}

/* CARD GRID */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 18px;
}

.card-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

/* PORTAL CARD */
.portal-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px 22px 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1.5px solid var(--gray-200);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.portal-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 36px rgba(26, 86, 160, 0.15);
    border-color: var(--blue-mid);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 4px;
    flex-shrink: 0;
}

.icon-blue {
    background: var(--blue-light);
}

.icon-amber {
    background: var(--accent-light);
}

.icon-green {
    background: var(--green-light);
}

.icon-red {
    background: var(--red-light);
}

.card-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text);
    line-height: 1.3;
}

.card-desc {
    font-size: 0.83rem;
    color: var(--gray-400);
    line-height: 1.5;
    flex: 1;
}

.card-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 9px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.18s, transform 0.1s;
    font-family: 'DM Sans', sans-serif;
}

.card-btn:hover {
    background: var(--blue-dark);
    transform: scale(1.03);
}

.card-btn.green {
    background: var(--green);
}

.card-btn.green:hover {
    background: #145a38;
}

.card-btn.amber {
    background: #c07a00;
    color: #fff;
}

.card-btn.amber:hover {
    background: #965f00;
}

.card-btn.red {
    background: var(--red);
}

.card-btn.red:hover {
    background: #8a1818;
}

/* NOTICE CARD */
.notice-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1.5px solid var(--gray-200);
    padding: 20px 22px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.notice-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(26, 86, 160, 0.14);
    border-color: var(--blue-mid);
}

.notice-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 6px;
}

.dot-amber {
    background: var(--accent);
}

.dot-red {
    background: var(--red);
}

.dot-blue {
    background: var(--blue-mid);
}

.notice-content {
    flex: 1;
}

.notice-tag {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 2px 9px;
    border-radius: 4px;
    margin-bottom: 6px;
    display: inline-block;
}

.tag-amber {
    background: var(--accent-light);
    color: #8a5c00;
}

.tag-red {
    background: var(--red-light);
    color: var(--red);
}

.tag-blue {
    background: var(--blue-light);
    color: var(--blue);
}

.notice-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 4px;
}

.notice-sub {
    font-size: 0.82rem;
    color: var(--gray-400);
}

.notice-arrow {
    font-size: 1.1rem;
    color: var(--gray-400);
    align-self: center;
    flex-shrink: 0;
    transition: color 0.18s, transform 0.18s;
}

.notice-card:hover .notice-arrow {
    color: var(--blue-mid);
    transform: translateX(4px);
}

/* ACADEMIC INFO */
.info-box {
    background: var(--white);
    border-radius: var(--radius);
    border: 1.5px solid var(--gray-200);
    box-shadow: var(--shadow);
    padding: 28px;
}

.info-meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.info-pill {
    background: var(--blue-light);
    color: var(--blue);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
}

.info-pill.amber {
    background: var(--accent-light);
    color: #8a5c00;
}

.info-pill.green {
    background: var(--green-light);
    color: var(--green);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.course-item {
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 16px;
    background: var(--gray-100);
}

.course-code {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--blue-mid);
    margin-bottom: 4px;
}

.course-name {
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text);
    margin-bottom: 4px;
}

.course-note {
    font-size: 0.8rem;
    color: var(--gray-400);
}

/* TOOLS */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 18px;
}

.tool-panel {
    background: var(--white);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

.tool-header {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    margin-bottom: 18px;
}

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.tool-title {
    font-weight: 700;
    font-size: 1.03rem;
    color: var(--text);
    margin-bottom: 4px;
}

.tool-subtitle {
    font-size: 0.84rem;
    color: var(--gray-400);
}

.tool-form {
    display: grid;
    gap: 14px;
}

.tool-field {
    display: grid;
    gap: 6px;
}

.tool-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-700);
}

.tool-field input,
.tool-field select {
    width: 100%;
    border: 1.5px solid var(--gray-200);
    border-radius: 10px;
    padding: 11px 12px;
    font: inherit;
    background: #fff;
    color: var(--text);
    outline: none;
    transition: border-color 0.18s, box-shadow 0.18s;
}

.tool-field input:focus,
.tool-field select:focus {
    border-color: var(--blue-mid);
    box-shadow: 0 0 0 3px rgba(53, 120, 212, 0.12);
}

.tool-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.tool-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.tool-note {
    font-size: 0.78rem;
    color: var(--gray-400);
    line-height: 1.5;
}

.tool-info {
    display: none;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    background: var(--gray-100);
    font-size: 0.84rem;
    color: var(--gray-700);
    line-height: 1.55;
    overflow-wrap: anywhere;
}

.tool-info.show {
    display: block;
}

.tool-info-title {
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.tool-info-list {
    display: grid;
    gap: 8px;
    margin-top: 8px;
}

.tool-info-item {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    padding: 10px 12px;
}

.tool-info-item strong {
    display: block;
    color: var(--text);
    margin-bottom: 2px;
}

.tool-status {
    font-size: 0.84rem;
    color: var(--gray-700);
    min-height: 1.25em;
}

.tool-result {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
}

.tool-result.show {
    display: flex;
}

.tool-result span {
    font-size: 0.84rem;
    color: var(--gray-700);
    overflow-wrap: anywhere;
}

.tool-result a {
    white-space: nowrap;
}

.tool-preview {
    width: 100%;
    max-height: 220px;
    object-fit: contain;
    border-radius: 12px;
    border: 1px dashed var(--gray-200);
    background: #fff;
}

/* FOOTER */
footer {
    background: var(--blue-dark);
    color: rgba(255, 255, 255, 0.75);
    text-align: center;
    padding: 24px 1.5rem;
    font-size: 0.85rem;
}

footer strong {
    color: var(--accent);
}

/* MOBILE NAV */
.mobile-menu {
    display: none;
    flex-direction: column;
    background: var(--blue-dark);
    padding: 10px 1.5rem 18px;
    gap: 4px;
}

.mobile-menu a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.mobile-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.mobile-menu.open {
    display: flex;
}

@media (max-width: 720px) {
    .nav-links {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .hero {
        padding: 44px 1rem 36px;
    }

    main {
        padding: 1.5rem 1rem 2rem;
    }

    .card-grid,
    .card-grid-2 {
        grid-template-columns: 1fr;
    }

    .tool-row {
        grid-template-columns: 1fr;
    }

    .tool-result {
        flex-direction: column;
        align-items: flex-start;
    }
}