/* ===============================
   EduTrack Dark Minimal Theme
================================= */

:root {
    --bg: #0b0f14;
    --surface: #121826;
    --surface-soft: #1a2233;
    --border: #1f2937;

    --primary: #7c7cff;
    --accent: #22c55e;
    --danger: #ef4444;

    --text-main: #e5e7eb;
    --text-muted: #9ca3af;
}

/* ===== Base Reset ===== */

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
}

/* Remove ALL link underlines globally */

a,
a:visited,
a:hover,
a:active {
    text-decoration: none !important;
}

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

.navbar {
    height: 64px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 32px;
}

.navbar-logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 1px;
    color: var(--primary);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar-user {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.navbar a {
    color: var(--text-main);
    font-size: 0.9rem;
}

.navbar a:hover {
    color: var(--primary);
}

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

.container {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 24px;
}

.dashboard {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0;
}

/* ===== Cards ===== */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
}

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

/* ===== Grid ===== */

.dashboard-grid {
    display: grid;
    grid-template-columns: 1.5fr 1.2fr;
    gap: 3rem;
    align-items: start;
}

/* ===== Lists ===== */

.list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list li {
    border-bottom: 1px solid var(--border);
}

.list li:first-child {
    border-top: 1px solid var(--border);
}

/* ===== Reusable Clickable Row ===== */

.clickable-row {
    display: block;
    padding: 1.25rem 0.75rem;
    transition: background 0.2s ease, transform 0.15s ease;
    cursor: pointer;
}

.clickable-row:hover {
    background: rgba(255, 255, 255, 0.04);
}

.clickable-row:active {
    transform: scale(0.995);
}

/* ===== Courses ===== */

.course-item {
    list-style: none;
}

.course-title {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--text-main);
}

.course-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.clickable-row:hover .course-title {
    color: var(--primary);
}

/* ===== Assignments ===== */

.assignment-row {
    color: var(--text-main);
}

.assignment-title {
    font-size: 1.05rem;
    font-weight: 500;
}

.assignment-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.assignment-row:hover .assignment-title {
    color: var(--primary);
}

hr {
    border: 0.5px solid var(--border);
}

/* ===== Muted text ===== */

.muted {
    color: var(--text-muted);
    font-size: 1.2rem;
    margin: 1.2rem 0;
}

/* ===== Buttons ===== */

button,
.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    display: inline-block;
}

button:hover,
.btn:hover {
    opacity: 0.9;
}

/* ===== Badges ===== */

.badge {
    padding: 3px 8px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-left: 8px;
}

.badge-green {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent);
}

.badge-orange {
    background: rgba(255, 165, 0, 0.15);
    color: orange;
}

.badge-red {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

/* ===== Video ===== */

video {
    margin-top: 16px;
    border-radius: 12px;
    width: 100%;
    border: 1px solid var(--border);
}


/* ===== Course Page Enhancements ===== */

.dashboard>.card {
    margin-bottom: 2rem;
}

.card h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.card h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Improve lesson block spacing */

.course-block {
    padding: 1.4rem 0.75rem;
}

.course-block video {
    margin-top: 16px;
}

/* Softer content spacing */

.card p {
    margin: 0.75rem 0;
}

/* Assignment block inside course */

.assignment-link {
    display: block;
    color: var(--text-main);
}

/* Danger button variant */

.btn-danger {
    background: var(--danger);
}

.btn-danger:hover {
    opacity: 0.85;
}

/* ===== Course Header Layout ===== */

.course-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.course-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

/* Back button style */

.btn-back {
    height: 2.5rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn-back:hover {
    background: var(--surface-soft);
    color: var(--text-main);
}

/* Description spacing */

.course-description {
    margin-top: 1rem;
}

/* ===== Modal ===== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
    animation: modalFadeIn 0.2s ease-out;
}

.modal h3 {
    margin-top: 0;
    margin-bottom: 8px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* Optional subtle animation */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

/* Secondary button */
.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}


/* Available courses layout */

.card>div {
    width: 100%;
}

.card form {
    align-self: center;
}

/* ===== Auth Page ===== */

.auth-wrapper {
    min-height: calc(100vh - 128px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.auth-title {
    margin-top: 0;
    margin-bottom: 24px;
    font-size: 1.6rem;
    font-weight: 600;
    text-align: center;
}

/* Form */

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 18px;
}

.form-group label {
    font-size: 0.85rem;
    margin-bottom: 6px;
    color: var(--text-muted);
}

/* Inputs */

input[type="text"],
input[type="password"] {
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text-main);
    font-size: 0.9rem;
    outline: none;
    transition: border 0.2s ease;
}

input:focus {
    border-color: var(--primary);
}

/* Button */

.auth-btn {
    width: 100%;
    margin-top: 8px;
}

/* Error */

.auth-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: var(--danger);
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.85rem;
    text-align: center;
}

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

.form-layout {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.error {
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--danger);
}

.form-group input[type="file"] {
    background: var(--surface-soft);
    border: 1px dashed var(--border);
    padding: 12px;
    cursor: pointer;
}

.form-group input[type="file"]:hover {
    border-color: var(--primary);
}

/* ===== Instructor Submissions ===== */

.submission-block {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
    margin-top: 2rem;
}

.submission-block:first-child {
    border-top: none;
    padding-top: 0;
    margin-top: 1rem;
}

.submission-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}