/* === Dark Web Marketplace Theme === */

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

:root {
    --bg-dark: #0a0a0a;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --bg-input: #1a1a1a;
    --green: #00ff41;
    --green-dim: #00cc33;
    --green-glow: rgba(0, 255, 65, 0.3);
    --red: #ff3333;
    --yellow: #ffcc00;
    --text: #cccccc;
    --text-dim: #888888;
    --border: #333333;
}

body {
    background-color: var(--bg-dark);
    color: var(--text);
    font-family: 'Courier New', Courier, monospace;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* === Navigation === */

.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--green);
    padding: 0.8rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px var(--green-glow);
}

.nav-brand a {
    color: var(--green);
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: bold;
    text-shadow: 0 0 10px var(--green-glow);
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.nav-logo {
    height: 36px;
    width: auto;
    filter: drop-shadow(0 0 6px var(--green-glow));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.nav-links a {
    color: var(--green-dim);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s, text-shadow 0.2s;
}

.nav-links a:hover {
    color: var(--green);
    text-shadow: 0 0 8px var(--green-glow);
}

.nav-user {
    color: var(--text-dim);
    font-size: 0.85rem;
    border-left: 1px solid var(--border);
    padding-left: 1rem;
}

.btn-logout {
    color: var(--red) !important;
    border: 1px solid var(--red);
    padding: 0.3rem 0.7rem;
    border-radius: 3px;
    font-size: 0.8rem !important;
}

.btn-logout:hover {
    background: var(--red);
    color: var(--bg-dark) !important;
    text-shadow: none !important;
}

/* === Container === */

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    flex: 1;
    width: 100%;
}

/* === Flash Messages === */

.flash-messages {
    margin-bottom: 1.5rem;
}

.flash {
    padding: 0.8rem 1rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    border-left: 3px solid;
    font-size: 0.9rem;
}

.flash-success {
    background: rgba(0, 255, 65, 0.1);
    border-color: var(--green);
    color: var(--green);
}

.flash-error {
    background: rgba(255, 51, 51, 0.1);
    border-color: var(--red);
    color: var(--red);
}

/* === Page Headers === */

.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.page-header h1 {
    color: var(--green);
    font-size: 1.5rem;
    text-shadow: 0 0 10px var(--green-glow);
    letter-spacing: 1px;
}

.page-header p {
    color: var(--text-dim);
    margin-top: 0.3rem;
    font-size: 0.9rem;
}

/* === Cards === */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.2rem;
    margin-bottom: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
    border-color: var(--green-dim);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.1);
}

.card-title {
    color: var(--green);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.card-meta {
    color: var(--text-dim);
    font-size: 0.85rem;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.card a {
    text-decoration: none;
    color: inherit;
    display: block;
}

/* === Course Summary Cards === */

.course-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-info {
    flex: 1;
}

.course-stats {
    display: flex;
    gap: 1.5rem;
    text-align: center;
}

.stat {
    display: flex;
    flex-direction: column;
}

/* === Dashboard Collapsible Courses === */

.caret {
    color: var(--green-dim);
    font-size: 0.8rem;
    transition: transform 0.2s;
    width: 1rem;
    display: inline-block;
    text-align: center;
}

.assignment-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1.2rem 0.6rem 2.8rem;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
    font-size: 0.9rem;
}

.assignment-row:last-child {
    border-bottom: none;
}

.assignment-row:hover {
    background: rgba(0, 255, 65, 0.05);
}

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

.assignment-row-stats {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    color: var(--text-dim);
    font-size: 0.85rem;
    white-space: nowrap;
}

.stat-separator {
    color: var(--border);
}

.stat-value {
    color: var(--green);
    font-size: 1.3rem;
    font-weight: bold;
}

.stat-label {
    color: var(--text-dim);
    font-size: 0.75rem;
    text-transform: uppercase;
}

/* === Hints === */

.assignment-section {
    margin-bottom: 2rem;
}

.assignment-title {
    color: var(--yellow);
    font-size: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--border);
    margin-bottom: 0.8rem;
    letter-spacing: 1px;
}

.hint-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-bottom: 0.5rem;
    transition: all 0.2s;
}

.hint-item:hover {
    border-color: var(--green-dim);
}

.hint-item.purchased {
    border-color: var(--green-dim);
    background: rgba(0, 255, 65, 0.05);
}

.hint-description {
    flex: 1;
    font-size: 0.9rem;
}

.hint-content {
    margin-top: 0.5rem;
    padding: 0.8rem;
    background: rgba(0, 255, 65, 0.08);
    border-left: 2px solid var(--green);
    border-radius: 3px;
    color: var(--green);
    font-size: 0.85rem;
    white-space: pre-wrap;
    overflow-wrap: break-word;
}

.hint-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 0.5rem 0;
    display: block;
}

.hint-cost {
    color: var(--yellow);
    font-weight: bold;
    margin: 0 1rem;
    white-space: nowrap;
}

.btn-cart {
    background: none;
    border: 1px solid var(--green-dim);
    color: var(--green-dim);
    padding: 0.4rem 0.8rem;
    border-radius: 3px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-cart:hover {
    background: var(--green);
    color: var(--bg-dark);
}

.btn-cart.in-cart {
    background: var(--green);
    color: var(--bg-dark);
}

.btn-cart:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* === Shopping Cart === */

.cart-area {
    position: sticky;
    bottom: 0;
    background: var(--bg-card);
    border-top: 2px solid var(--green);
    padding: 1rem 1.5rem;
    margin-top: 2rem;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.cart-title {
    color: var(--green);
    font-size: 1rem;
}

.cart-total {
    color: var(--yellow);
    font-size: 1.1rem;
    font-weight: bold;
}

.cart-items {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 0.8rem;
    max-height: 100px;
    overflow-y: auto;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    padding: 0.2rem 0;
}

.btn-purchase {
    background: var(--green);
    color: var(--bg-dark);
    border: none;
    padding: 0.7rem 2rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 4px;
    width: 100%;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.btn-purchase:hover {
    box-shadow: 0 0 20px var(--green-glow);
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

.btn-purchase:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    box-shadow: none;
}

.cart-empty {
    display: none;
}

/* === Forms === */

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    color: var(--green-dim);
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.7rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 5px var(--green-glow);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border: 1px solid var(--green);
    background: transparent;
    color: var(--green);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background: var(--green);
    color: var(--bg-dark);
}

.btn-danger {
    border-color: var(--red);
    color: var(--red);
}

.btn-danger:hover {
    background: var(--red);
    color: var(--bg-dark);
}

.btn-small {
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* === Drop Zone === */

.drop-zone {
    margin-top: 0.5rem;
    padding: 1.2rem;
    border: 2px dashed var(--border);
    border-radius: 6px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.drop-zone:hover {
    border-color: var(--green-dim);
    color: var(--green-dim);
}

.drop-zone.drag-over {
    border-color: var(--green);
    background: rgba(0, 255, 65, 0.08);
    color: var(--green);
}

/* === Tables === */

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    padding: 0.7rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--green-dim);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

tr:hover {
    background: rgba(0, 255, 65, 0.03);
}

/* === Login Page === */

.login-container {
    max-width: 400px;
    margin: 4rem auto;
}

.login-box {
    background: var(--bg-card);
    border: 1px solid var(--green);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 0 30px var(--green-glow);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--green);
    font-size: 1.8rem;
    text-shadow: 0 0 15px var(--green-glow);
    letter-spacing: 3px;
}

.login-logo {
    width: 120px;
    height: auto;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 15px var(--green-glow));
}

.login-btn {
    width: 100%;
    padding: 0.8rem;
    background: var(--green);
    color: var(--bg-dark);
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.2s;
}

.login-btn:hover {
    box-shadow: 0 0 20px var(--green-glow);
}

/* === Balance Display === */

.balance-display {
    color: var(--yellow);
    font-size: 1.2rem;
    font-weight: bold;
    padding: 0.5rem 0;
}

.balance-label {
    color: var(--text-dim);
    font-size: 0.8rem;
    text-transform: uppercase;
}

/* === Footer === */

.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-dim);
    font-size: 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

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

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--green);
    border-radius: 8px;
    padding: 2rem;
    max-width: 450px;
    width: 90%;
    box-shadow: 0 0 30px var(--green-glow);
    text-align: center;
}

.modal-box h2 {
    color: var(--green);
    margin-bottom: 1rem;
}

.modal-box p {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* === Responsive === */

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 0.5rem;
    }

    .nav-links {
        gap: 0.8rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .course-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .course-stats {
        width: 100%;
        justify-content: space-around;
    }

    .hint-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .hint-cost {
        margin: 0;
    }
}

/* === Admin specific === */

.admin-section {
    margin-bottom: 2rem;
}

.inline-form {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.inline-form .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 150px;
}

.inline-form .btn {
    height: 38px;
}

.toggle-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
}

.toggle-btn.active {
    border-color: var(--green);
    color: var(--green);
}

.toggle-btn.purchased {
    border-color: var(--yellow);
    color: var(--yellow);
}

.breadcrumb {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.breadcrumb a {
    color: var(--green-dim);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--green);
}

.file-input-wrap {
    position: relative;
}

.file-input-wrap input[type="file"] {
    width: 100%;
    padding: 0.7rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: inherit;
}

.back-link {
    color: var(--green-dim);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: 1rem;
}

.back-link:hover {
    color: var(--green);
}