/*
 * Canvas Core Stylesheet
 * Used for Interactive Lab Assessments
 */

:root {
    /* Colors - Updated to match STYLE_GUIDE.md */
    --primary-color: #1e293b;
    --secondary-color: #3b82f6;
    --accent-color: #ef4444;
    --accent-hover: #dc2626;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #334155;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;

    /* Legacy Aliases for compatibility */
    --bg-primary: var(--bg-color);
    --panel-bg: var(--card-bg);
    --text-main: var(--text-color);
    --text-muted: #64748b;
    --success: var(--success-color);
    --error: var(--accent-color);
    --primary-light: var(--secondary-color);
    --primary: var(--primary-color);
    --secondary: var(--secondary-color);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.5;
}

/* Modal Framework Overlay Rules (Entry/Exit Screens) */
.celebration-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(15, 23, 42, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.celebration-card {
    background-color: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.15);
    animation: popIn 0.3s ease-out;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.celebration-card h2 { color: var(--primary-color); margin-bottom: 12px; margin-top: 0; }
.celebration-card p { color: var(--text-muted); margin-bottom: 20px; font-size: 0.95rem; line-height: 1.5; }
.celebration-card input {
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 0.6rem 1.2rem;
    width: 100%;
    margin-bottom: 0.8rem;
}
.celebration-card .btn-primary {
    background: var(--primary-color);
    border: none;
    color: white;
    padding: 0.6rem 1.5rem;
    border-radius: 40px;
    font-weight: 600;
    width: 100%;
    cursor: pointer;
    transition: 0.2s;
}
.celebration-card .btn-primary:hover { background: #0f172a; }
.error-msg { color: var(--accent-color); font-size: 0.8rem; margin-top: -0.4rem; margin-bottom: 0.5rem; }

/* Forms & Inputs */
.form-group {
    text-align: left;
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

input[type="text"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.error-msg {
    color: var(--error);
    font-size: 0.8rem;
    margin-top: 4px;
    display: none;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-align: center;
    width: 100%;
    color: white;
}

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

.btn-primary:hover {
    background-color: #0f172a;
}

.btn-secondary {
    background-color: #e2e8f0;
    color: #475569;
}

.btn-secondary:hover {
    background-color: #cbd5e1;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-accent {
    background-color: var(--accent-color);
}

.btn-accent:hover {
    background-color: var(--accent-hover);
}

/* Progress Bar */
.progress-container {
    background: var(--border-color);
    height: 10px;
    border-radius: 5px;
    width: 100%;
    margin: 1rem 0;
    overflow: hidden;
}

.progress-bar {
    background: var(--success);
    height: 100%;
    width: 0%;
    transition: width 0.4s ease;
}

/* Utility Classes */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.mt-1 { margin-top: 0.5rem; }
.mb-1 { margin-bottom: 0.5rem; }

/* ============================================
   SHARED ASSESSMENT COMPONENTS
   ============================================ */

/* Stepper */
.stepper-container {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.step-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #e2e8f0;
    transition: all 0.3s ease;
}
.step-dot.active {
    background: var(--secondary);
    transform: scale(1.2);
}
.step-dot.verified {
    background: var(--success);
}

/* Task Workspace */
#taskWorkspace {
    position: relative;
    min-height: 250px;
}

/* Task Card Transitions */
.task-card-active {
    animation: slideIn 0.4s ease-out;
}
@keyframes slideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes successPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); background-color: #f0fdf4; }
    100% { transform: scale(1); }
}
.success-pulse {
    animation: successPulse 0.4s ease-out;
}

/* Option Grid (MCQ) */
.option-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-top: 0.75rem;
}
.interactive-option {
    padding: 0.7rem 0.9rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.interactive-option:hover {
    border-color: var(--secondary);
    background: #f8fafc;
}
.interactive-option.selected {
    border-color: var(--secondary);
    background: #eff6ff;
}

/* Drag & Drop */
.drag-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 0.5rem 0;
}
.drag-item {
    padding: 0.55rem 0.85rem;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    cursor: grab;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.drag-item:active { cursor: grabbing; }

/* Matching */
.matching-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.5rem 0;
}
.matching-row span { font-weight: 500; min-width: 120px; }
.matching-row select { flex: 1; padding: 0.4rem; border: 1px solid var(--border-color); border-radius: 6px; }

/* Mini data tables (for inline examples) */
.db-table-mini { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin: 0.75rem 0; background: white; }
.db-table-mini th, .db-table-mini td { border: 1px solid #cbd5e1; padding: 0.4rem; text-align: left; }
.db-table-mini th { background: #f1f5f9; }

/* Drag order lists */
.drag-order-list { list-style: none; padding: 0; margin: 0.5rem 0; }
.drag-order-list li { padding: 0.5rem 0.75rem; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 6px; margin-bottom: 0.3rem; cursor: grab; }

/* Text answer inputs */
.text-answer-input { width: 100%; padding: 0.5rem; border: 1px solid var(--border-color); border-radius: 6px; font-size: 0.9rem; }
.text-answer-input:focus { outline: none; border-color: var(--secondary-color); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15); }

/* Code snippets */
.code-snippet { background: #1e293b; color: #e2e8f0; padding: 1rem; border-radius: 8px; overflow-x: auto; margin: 0.75rem 0; font-size: 0.85rem; }
.code-snippet pre { margin: 0; }
.code-snippet code { font-family: 'Fira Code', monospace; }

/* Verification Status */
.verification-text {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.verification-text.unverified { color: #64748b; }
.verification-text.verified { color: var(--success); }

/* Feedback */
.feedback-msg {
    font-size: 0.9rem;
    margin-top: 0.5rem;
    min-height: 1.2rem;
}
.feedback-msg.error { color: var(--error); }

/* ============================================
   RESPONSIVE DESIGN - STYLE GUIDE COMPLIANT
   ============================================ */

/* Mobile First - Extra Small Devices (360px and up) */
@media (max-width: 360px) {
    body {
        padding: 1rem 0.5rem;
    }

    .celebration-card {
        padding: 1.5rem;
        width: 95%;
    }

    .celebration-card h2 {
        font-size: 1.3rem;
    }

    .form-group label {
        font-size: 0.8rem;
    }

    input[type="text"],
    input[type="number"],
    select,
    textarea {
        font-size: 0.9rem;
        padding: 0.6rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    /* Ensure touch targets are at least 44x44px */
    button, .btn, input, select {
        min-height: 44px;
        min-width: 44px;
    }
}

/* Small Devices (600px and up) */
@media (max-width: 600px) {
    .celebration-card {
        padding: 2rem;
        max-width: 90%;
    }

    .celebration-card h2 {
        font-size: 1.5rem;
    }

    /* Forms stack vertically */
    .form-group {
        margin-bottom: 1rem;
    }

    /* Status bar wraps nicely */
    .status-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .status-bar .student-info {
        flex-wrap: wrap;
    }

    .status-bar .student-info span {
        margin-right: 0.4rem;
        margin-bottom: 0.3rem;
    }
}

/* Medium Devices (768px and up) */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .celebration-card {
        max-height: 85vh;
        overflow-y: auto;
    }

    /* Task cards - full width on mobile */
    .task-card {
        padding: 1rem 1.2rem;
    }

    .task-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .task-input-area {
        flex-direction: column;
        align-items: stretch;
    }

    .task-input-area input,
    .task-input-area select {
        width: 100%;
        min-width: auto;
    }

    .check-btn {
        width: 100%;
        margin-top: 0.5rem;
    }

    /* Drag and drop adjustments */
    .drag-group {
        flex-direction: column;
        gap: 0.4rem;
    }

    .drag-item {
        width: 100%;
        text-align: center;
        padding: 0.6rem 1rem;
    }

    .drop-zone {
        min-width: 100%;
        padding: 0.6rem 1rem;
    }

    /* Crossword grid - smaller cells on mobile */
    .crossword-grid {
        grid-template-columns: repeat(5, 40px);
        gap: 3px;
    }

    .crossword-grid input {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Large Devices (1024px and up) */
@media (min-width: 1024px) {
    body {
        padding: 1.5rem;
    }

    .celebration-card {
        max-width: 500px;
    }

    /* Task cards can use more horizontal space */
    .task-input-area {
        flex-wrap: nowrap;
    }
}

/* Prevent horizontal scrolling on all devices */
html, body {
    max-width: 100%;
    overflow-x: hidden;
}

/* Ensure images and media are responsive */
img, video, iframe {
    max-width: 100%;
    height: auto;
}

/* Touch-friendly interactive elements */
button, .btn, a, input, select, textarea {
    touch-action: manipulation;
}

/* Improve readability on mobile */
@media (max-width: 768px) {
    body {
        font-size: 16px;
        line-height: 1.5;
    }

    .celebration-card h2,
    .task-question {
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
}

/* Assessment header responsive */
.assessment-header {
    padding: 1.5rem 1rem;
}

@media (max-width: 600px) {
    .assessment-header h1 {
        font-size: 1.5rem;
    }

    .assessment-header .subtitle {
        font-size: 0.95rem;
    }

    .assessment-header .grade-badge {
        font-size: 0.8rem;
    }
}

/* Canvas container responsive */
.canvas-container {
    padding: 1.5rem 1rem;
}

@media (max-width: 768px) {
    .canvas-container {
        padding: 1rem;
        border-radius: 8px;
    }
}

@media (min-width: 1024px) {
    .canvas-container {
        padding: 2rem 2rem 1.5rem;
        border-radius: 2rem;
    }
}

/* Assessment-specific component styles */
.assessment-header {
    background: linear-gradient(135deg, var(--primary-color), #2c3e50);
    color: white;
    padding: 2rem 2rem 1.5rem;
    text-align: center;
    border-radius: 0 0 2rem 2rem;
    margin-bottom: 2rem;
}

.assessment-header h1 {
    margin: 0 0 0.5rem 0;
    font-size: 2rem;
}

.assessment-header .subtitle {
    margin: 0 0 1rem 0;
    opacity: 0.9;
    font-size: 1.1rem;
}

.assessment-header .grade-badge {
    background: var(--secondary-color);
    padding: 0.3rem 1rem;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
}

.canvas-container {
    max-width: 1100px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 2rem;
    box-shadow: 0 12px 30px rgba(0,0,0,0.05);
    padding: 2rem 2rem 1.5rem;
}

.status-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-color);
    padding: 0.8rem 1.5rem;
    border-radius: 3rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.status-bar .student-info span {
    background: var(--border-color);
    padding: 0.2rem 0.8rem;
    border-radius: 30px;
    margin-right: 0.6rem;
    font-weight: 500;
}

.progress-indicator {
    background: #eef2ff;
    padding: 0.2rem 1.2rem;
    border-radius: 40px;
    font-weight: 600;
    color: var(--primary-color);
}

.task-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.task-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 1rem 1.2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    transition: border 0.2s, background 0.2s;
}

.task-card.verified {
    border-left: 6px solid var(--success-color);
    background: #fafffa;
}

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

.task-header .task-num {
    font-weight: 700;
    color: var(--primary-color);
    background: #e6edf6;
    padding: 0.1rem 0.8rem;
    border-radius: 40px;
}

.task-header .status-badge {
    font-size: 0.8rem;
    background: #e9eef3;
    padding: 0.2rem 0.8rem;
    border-radius: 40px;
    color: var(--text-color);
}

.task-header .status-badge.verified {
    background: #d4edda;
    color: #155724;
}

.task-question {
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--primary-color);
}

.task-input-area {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    margin: 0.5rem 0 0.2rem;
}

.task-input-area input,
.task-input-area select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 40px;
    background: var(--card-bg);
    font-size: 0.9rem;
    min-width: 200px;
}

.task-input-area input:focus {
    outline: 2px solid var(--secondary-color);
    border-color: transparent;
}

.check-btn {
    background: var(--primary-color);
    border: none;
    color: white;
    padding: 0.5rem 1.4rem;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.check-btn:hover {
    background: #0f172a;
}

.check-btn.success {
    background: var(--success-color);
}

/* Button Row — Verify + Next inline */
.btn-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    align-items: center;
    margin-top: 1rem;
    flex-wrap: wrap;
}
.btn-row .btn {
    width: auto;
    flex: 0 0 auto;
}
@media (max-width: 480px) {
    .btn-row {
        flex-direction: column;
        align-items: stretch;
    }
    .btn-row .btn {
        width: 100%;
    }
}

.feedback {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
    min-height: 1.4rem;
}

.feedback.valid {
    color: var(--success-color);
}

.feedback.invalid {
    color: var(--accent-color);
}

.formula-badge {
    background: #eef2ff;
    padding: 0.1rem 0.6rem;
    border-radius: 30px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.flex {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    align-items: center;
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.2rem 0;
}

/* Drag and drop styles */
.drag-group {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin: 0.5rem 0;
}

.drag-item {
    background: #eef2ff;
    padding: 0.4rem 1rem;
    border-radius: 40px;
    border: 1px solid #b8c9f0;
    cursor: grab;
    user-select: none;
    font-weight: 500;
    transition: 0.15s;
}

.drag-item:active {
    cursor: grabbing;
}

.drop-zone {
    display: inline-block;
    background: var(--bg-color);
    border: 2px dashed #b8c9f0;
    border-radius: 40px;
    padding: 0.4rem 1.2rem;
    min-width: 100px;
    text-align: center;
    color: var(--text-color);
    font-weight: 400;
    transition: 0.2s;
}

.drop-zone.dragover {
    background: #dbeafe;
    border-color: var(--primary-color);
}

.drop-zone.filled {
    background: #d4edda;
    border-color: var(--success-color);
    color: #155724;
}

/* Crossword styles */
.crossword-grid {
    display: grid;
    grid-template-columns: repeat(5, 44px);
    gap: 4px;
    margin: 0.5rem 0;
}

.crossword-grid input {
    width: 44px;
    height: 44px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: uppercase;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    outline: none;
}

.crossword-grid input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px #b8c9f0;
}

.crossword-grid input.correct {
    background: #d4edda;
    border-color: var(--success-color);
}

.crossword-clues {
    font-size: 0.9rem;
    margin: 0.3rem 0;
    color: var(--text-color);
}

.crossword-clues strong {
    color: var(--primary-color);
}

.inline-flex {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}