:root {
    --primary: #2f6fed;
    --primary-dark: #1e4fd6;
    --navy: #0b1c3f;
    --text-muted: #5b6b85;
    --bg-page: #eef3fb;
    --bg-hero: linear-gradient(180deg, #e3ecfb 0%, #eef3fb 100%);
    --card-bg: #ffffff;
    --border-color: #e2e8f5;
    --radius: 14px;
    --shadow: 0 4px 16px rgba(15, 28, 63, 0.06);
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    background: var(--bg-page);
    color: var(--navy);
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    text-decoration: underline;
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ================= Navbar ================= */

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px 20px;
    padding: 14px 24px;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--navy);
}

.navbar .brand img {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.navbar .nav-right {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 14px;
    font-size: 0.95rem;
}

.navbar .nav-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text-muted);
}

.navbar .nav-links a {
    color: var(--text-muted);
}

.navbar .nav-links a.active {
    color: var(--primary);
}

/* ================= Buttons & Inputs ================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 10px;
    border: none;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease, transform 0.1s ease;
    min-height: 42px;
    text-align: center;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
    text-decoration: none;
}

.btn-outline {
    background: #fff;
    border: 1px solid var(--border-color);
    color: var(--navy);
}

.btn-outline:hover {
    background: #f5f8ff;
    text-decoration: none;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.85rem;
    border-radius: 8px;
    min-height: 34px;
}

/* ================= Layout Containers ================= */

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

.hero {
    background: var(--bg-hero);
    padding: 56px 24px;
}

.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-text {
    max-width: 560px;
    flex: 1;
}

.hero .eyebrow {
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 1px;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    margin: 0 0 16px;
    line-height: 1.25;
    word-break: break-word;
}

.hero p {
    color: var(--text-muted);
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    max-width: 560px;
    margin: 0 0 20px;
}

.hero-image-wrap {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    max-width: 100%;
}

.hero-image-wrap img {
    max-width: 420px;
    width: 100%;
    height: auto;
    display: block;
}

/* ================= Grids & Cards ================= */

.grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    max-width: 1000px;
    margin: -40px auto 60px;
    padding: 0 24px;
    width: 100%;
}

.page-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px 60px;
    width: 100%;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
    margin-bottom: 24px;
    word-wrap: break-word;
}

.sidebar-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
    margin-bottom: 20px;
    word-wrap: break-word;
}

.card h2, .card h3, .sidebar-card h3 {
    margin-top: 0;
}

.card-title-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.card-icon-circle {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: #eaf1ff;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* ================= Disease Badge List ================= */

.class-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 20px;
}

.class-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
}

.class-badge {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

/* ================= Forms ================= */

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    background-color: #fff;
    min-height: 42px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
}

/* ================= Dropzone ================= */

.dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 36px 20px;
    text-align: center;
    background: #fafcff;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.dropzone.dragover {
    border-color: var(--primary);
    background: #eaf1ff;
}

.dropzone .dz-icon {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.dropzone .dz-filename {
    margin-top: 10px;
    font-size: 0.88rem;
    color: var(--primary);
    font-weight: 600;
    word-break: break-all;
}

.dropzone .dz-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* ================= Tables ================= */

.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 16px;
}

table.styled {
    width: 100%;
    border-collapse: collapse;
    min-width: 480px;
}

table.styled th,
table.styled td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
}

table.styled th {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: #f8fafc;
}

/* ================= Alerts & Badges ================= */

.alert-info {
    background: #eaf1ff;
    border: 1px solid #cfe0ff;
    border-radius: var(--radius);
    padding: 16px;
    color: #1c3f8f;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.alert-error {
    background: #fdeaea;
    border: 1px solid #f7c9c9;
    border-radius: var(--radius);
    padding: 16px;
    color: #b3261e;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.alert-warning {
    background: #fff7e6;
    border: 1px solid #ffe1a8;
    border-radius: var(--radius);
    padding: 16px;
    color: #8a5a00;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.urgency-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
}

.urgency-tinggi {
    background: #fdeaea;
    color: #b3261e;
}

.urgency-sedang {
    background: #fff7e6;
    color: #8a5a00;
}

.urgency-rutin {
    background: #eafaf0;
    color: #147a3c;
}

/* ================= AI Analysis Result Panel ================= */

.result-panel {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: linear-gradient(180deg, #f5f9ff 0%, #ffffff 100%);
    padding: 24px;
    margin-bottom: 24px;
}

.result-panel .result-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 14px;
}

.result-panel .result-label {
    font-size: clamp(1.1rem, 3vw, 1.35rem);
    font-weight: 700;
    color: var(--navy);
}

.result-panel .confidence-bar-track {
    background: var(--border-color);
    border-radius: 999px;
    height: 8px;
    overflow: hidden;
    margin: 6px 0 4px;
}

.result-panel .confidence-bar-fill {
    background: var(--primary);
    height: 100%;
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.result-section {
    margin-top: 14px;
}

.result-section h4 {
    margin: 0 0 8px;
    font-size: 0.9rem;
    color: var(--navy);
}

.result-section ul {
    margin: 0;
    padding-left: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

.gradcam-thumb {
    max-width: 220px;
    width: 100%;
    height: auto;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    margin-top: 10px;
}

/* ================= Footer ================= */

.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ================= Media Queries (Responsiveness) ================= */

@media (max-width: 900px) {
    .hero-inner {
        flex-direction: column;
        text-align: center;
        gap: 28px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero p {
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 860px) {
    .grid {
        grid-template-columns: 1fr;
        margin-top: 0;
    }

    .page-grid {
        grid-template-columns: 1fr;
        padding-top: 20px;
    }
}

@media (max-width: 768px) {
    .form-row-3 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .navbar {
        padding: 12px 16px;
    }

    .container, .grid, .page-grid, .hero {
        padding-left: 16px;
        padding-right: 16px;
    }

    .card, .sidebar-card, .result-panel {
        padding: 18px 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

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

    .navbar .brand span:not(:first-child) {
        font-size: 0.8rem;
    }

    .btn {
        width: 100%;
        margin-bottom: 4px;
    }

    .navbar .btn, .navbar .nav-right {
        width: auto;
    }

    .dropzone {
        padding: 24px 14px;
    }
}

@media (max-width: 480px) {
    .class-list {
        grid-template-columns: 1fr;
    }

    .navbar {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .navbar .brand {
        justify-content: center;
    }

    .navbar .nav-right {
        justify-content: center;
        width: 100%;
    }
}