:root {
    --bg-main: #0b0f19;
    --bg-card: #151c2c;
    --bg-box: #1e293b;
    --border-color: #334155;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #8b5cf6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --code-bg: #0f172a;
    --output-bg: #020617;
    --success: #10b981;
    --error: #ef4444;
}

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

body {
    font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    direction: rtl;
}

.main-header {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
    border-bottom: 1px solid var(--border-color);
    padding: 2rem 1rem;
    text-align: center;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.header-container p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.content-container {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* Views */
.view {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.view.active {
    display: block;
    opacity: 1;
}

/* Home View */
.welcome-banner {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.welcome-banner h2 {
    font-size: 1.5rem;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.welcome-banner p {
    color: var(--text-muted);
    line-height: 1.6;
}

.task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.task-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.task-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 15px 30px -10px rgba(59, 130, 246, 0.2);
}

.task-card h3 {
    font-size: 1.2rem;
    color: #ffffff;
    margin-bottom: 0.75rem;
}

.task-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1.5rem;
}

.task-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: var(--primary);
    font-size: 0.9rem;
}

/* Detail View */
.nav-bar {
    margin-bottom: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-box);
    border-color: var(--primary);
}

.task-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.task-detail-title {
    font-size: 1.8rem;
    color: #ffffff;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.section-box {
    background: var(--bg-box);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.section-box h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.box-content {
    line-height: 1.8;
    color: var(--text-main);
    white-space: pre-line;
}

/* Code Box */
.code-box {
    padding: 0;
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.code-header h3 {
    margin: 0;
}

.code-container {
    background: var(--code-bg);
    padding: 1.5rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    color: #e2e8f0;
    overflow-x: auto;
    white-space: pre;
    text-align: left;
}

/* Output Box */
.output-box {
    display: none;
}

.output-box.active {
    display: block;
}

.stdout-container {
    background: var(--output-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: #38bdf8;
    white-space: pre-wrap;
    text-align: left;
    margin-bottom: 1.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.stdout-container:empty {
    display: none;
}

.images-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.images-container img {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

/* Loader */
.loader-container {
    display: none;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    gap: 1rem;
    color: var(--text-muted);
}

.loader-container.active {
    display: flex;
}

.loader {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-bottom-color: var(--primary);
    border-radius: 50%;
    animation: rotation 1s linear infinite;
}

@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.main-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    margin-top: auto;
}