/* =====================================================
   ExamEdge — Frontend Exam Styles
   ===================================================== */

/* Sticky timer bar */
.examedge-timer-bar {
    position: sticky;
    top: 0;
    z-index: 200;
    background: var(--examedge-surface);
    border-bottom: 2px solid var(--examedge-border);
    padding: .625rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--examedge-shadow);
}
.examedge-timer-bar__title { font-weight: 700; font-size: 1rem; }
.examedge-timer-bar__progress { font-size: .875rem; color: var(--examedge-text-muted); }
.examedge-timer-bar__clock {
    font-size: 1.125rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--examedge-text);
    background: var(--examedge-bg);
    padding: .25rem .75rem;
    border-radius: var(--examedge-radius);
    border: 1px solid var(--examedge-border);
    min-width: 80px;
    text-align: center;
}
.examedge-timer-bar__clock--warning { color: var(--examedge-warning); border-color: var(--examedge-warning); }
.examedge-timer-bar__clock--critical { color: var(--examedge-danger); border-color: var(--examedge-danger); animation: ee-blink 1s step-start infinite; }
@keyframes ee-blink { 50% { opacity: .4; } }

.examedge-timer-bar__progress-track {
    flex: 1;
    height: 6px;
    background: var(--examedge-border);
    border-radius: 9999px;
    margin: 0 1rem;
    overflow: hidden;
}
.examedge-timer-bar__progress-fill {
    height: 100%;
    background: var(--examedge-primary);
    border-radius: 9999px;
    transition: width 1s linear, background .5s;
}

/* Exam layout */
.examedge-exam-layout {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 1.5rem;
    max-width: 1100px;
    margin: 1.5rem auto;
    padding: 0 1rem;
}
@media (max-width: 900px) {
    .examedge-exam-layout { grid-template-columns: 1fr; }
    .examedge-question-palette { order: -1; }
}

/* Question card */
.examedge-question-card {
    background: var(--examedge-surface);
    border: 1px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    box-shadow: var(--examedge-shadow);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
}
.examedge-question-card__header {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: 1.25rem;
    padding-bottom: .875rem;
    border-bottom: 1px solid var(--examedge-border);
}
.examedge-question-card__number {
    font-size: .875rem;
    font-weight: 700;
    color: var(--examedge-text-muted);
    min-width: 3rem;
}
.examedge-question-card__marks {
    margin-left: auto;
    font-size: .8125rem;
    background: var(--examedge-primary);
    color: #fff;
    padding: .2rem .625rem;
    border-radius: 9999px;
    font-weight: 600;
}
.examedge-question-card__text {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}
.examedge-question-card__image { margin-bottom: 1.25rem; border-radius: var(--examedge-radius); max-height: 400px; object-fit: contain; }

/* Option styles — Classic */
.examedge-option {
    display: flex;
    align-items: center;
    gap: .875rem;
    padding: .75rem 1rem;
    border: 1.5px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    margin-bottom: .625rem;
    cursor: pointer;
    transition: border-color .15s, background .15s;
    user-select: none;
}
.examedge-option:hover { border-color: var(--examedge-primary); background: #eff6ff; }
.examedge-option--selected { border-color: var(--examedge-primary); background: #eff6ff; }
.examedge-option--correct  { border-color: var(--examedge-success); background: #f0fdf4; }
.examedge-option--wrong    { border-color: var(--examedge-danger);  background: #fef2f2; }
.examedge-option__radio,
.examedge-option__checkbox { accent-color: var(--examedge-primary); width: 1.125rem; height: 1.125rem; flex-shrink: 0; }
.examedge-option__label    { font-size: .9375rem; flex: 1; }
.examedge-option__letter   { font-weight: 700; width: 1.5rem; color: var(--examedge-primary); flex-shrink: 0; }

/* True/false toggle */
.examedge-tf-options { display: flex; gap: 1rem; }
.examedge-tf-btn {
    flex: 1;
    padding: .875rem;
    border: 2px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    background: var(--examedge-surface);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
    text-align: center;
}
.examedge-tf-btn:hover { border-color: var(--examedge-primary); color: var(--examedge-primary); }
.examedge-tf-btn--selected { background: var(--examedge-primary); border-color: var(--examedge-primary); color: #fff; }

/* Fill in blank inputs */
.examedge-blank-input {
    display: inline-block;
    width: 160px;
    border: none;
    border-bottom: 2px solid var(--examedge-primary);
    background: transparent;
    padding: .125rem .25rem;
    font-size: 1rem;
    outline: none;
    text-align: center;
}
.examedge-blank-input:focus { border-bottom-color: var(--examedge-accent); }

/* Short answer textarea */
.examedge-short-answer-textarea {
    width: 100%;
    min-height: 140px;
    padding: .75rem;
    border: 1.5px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    font-size: .9375rem;
    font-family: inherit;
    resize: vertical;
    outline: none;
    transition: border-color .2s;
}
.examedge-short-answer-textarea:focus { border-color: var(--examedge-primary); box-shadow: 0 0 0 3px rgb(26 86 219/.1); }
.examedge-word-count { font-size: .8rem; color: var(--examedge-text-muted); text-align: right; margin-top: .25rem; }

/* Navigation controls */
.examedge-nav-controls {
    display: flex;
    flex-wrap: wrap;
    gap: .625rem;
    margin-top: 1.5rem;
    align-items: center;
}
.examedge-nav-controls .examedge-btn--prev { margin-right: auto; }
.examedge-mark-review-btn { background: #fef9c3; border-color: var(--examedge-warning); color: #92400e; }
.examedge-mark-review-btn--active { background: var(--examedge-warning); color: #fff; }
.examedge-clear-btn { background: #fef2f2; border-color: var(--examedge-danger); color: var(--examedge-danger); }

/* Question palette */
.examedge-question-palette {
    background: var(--examedge-surface);
    border: 1px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    box-shadow: var(--examedge-shadow);
    padding: 1.25rem;
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}
.examedge-question-palette__title { font-weight: 700; font-size: .9375rem; margin-bottom: 1rem; }
.examedge-palette-legend { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .875rem; }
.examedge-palette-legend__item { display: flex; align-items: center; gap: .3rem; font-size: .75rem; color: var(--examedge-text-muted); }
.examedge-palette-dot { width: 12px; height: 12px; border-radius: 3px; flex-shrink: 0; }
.examedge-palette-dot--unattempted { background: #e2e8f0; }
.examedge-palette-dot--answered    { background: var(--examedge-primary); }
.examedge-palette-dot--marked      { background: var(--examedge-warning); }
.examedge-palette-dot--visited     { background: var(--examedge-danger); }
.examedge-palette-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: .375rem; }
.examedge-palette-btn {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 4px;
    border: none;
    background: #e2e8f0;
    font-size: .8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, transform .1s;
    color: var(--examedge-text);
}
.examedge-palette-btn:hover { transform: scale(1.1); }
.examedge-palette-btn.answered    { background: var(--examedge-primary); color: #fff; }
.examedge-palette-btn.marked      { background: var(--examedge-warning); color: #fff; }
.examedge-palette-btn.visited     { background: var(--examedge-danger);  color: #fff; }
.examedge-palette-btn.current     { outline: 3px solid var(--examedge-text); outline-offset: 1px; }

/* Submit section */
.examedge-submit-area {
    background: var(--examedge-surface);
    border: 1px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    padding: 1.25rem;
    margin-top: 1rem;
    text-align: center;
}
.examedge-autosave-indicator {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background: var(--examedge-success);
    color: #fff;
    padding: .375rem .875rem;
    border-radius: var(--examedge-radius);
    font-size: .8125rem;
    font-weight: 600;
    opacity: 0;
    transition: opacity .3s;
    z-index: 300;
}
.examedge-autosave-indicator--show { opacity: 1; }

/* Confirmation modal */
.examedge-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgb(0 0 0/.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
}
.examedge-modal-overlay--open { opacity: 1; pointer-events: all; }
.examedge-modal {
    background: var(--examedge-surface);
    border-radius: var(--examedge-radius);
    box-shadow: var(--examedge-shadow-md);
    padding: 2rem;
    max-width: 480px;
    width: 90%;
    text-align: center;
}
.examedge-modal__title { font-size: 1.25rem; font-weight: 700; margin-bottom: .75rem; }
.examedge-modal__body  { color: var(--examedge-text-muted); margin-bottom: 1.5rem; }
.examedge-modal__actions { display: flex; gap: .75rem; justify-content: center; }

/* Result / answer review */
.examedge-result-review { margin-top: 2rem; }
.examedge-result-q {
    border: 1px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    background: var(--examedge-surface);
}
.examedge-result-q--correct { border-left: 4px solid var(--examedge-success); }
.examedge-result-q--wrong   { border-left: 4px solid var(--examedge-danger); }
.examedge-result-q--skipped { border-left: 4px solid #94a3b8; }
.examedge-result-q__explanation { margin-top: .75rem; padding: .75rem; background: #eff6ff; border-radius: var(--examedge-radius); font-size: .875rem; color: #1e40af; }

/* Intro page */
.examedge-exam-intro {
    max-width: 680px;
    margin: 2rem auto;
    background: var(--examedge-surface);
    border: 1px solid var(--examedge-border);
    border-radius: var(--examedge-radius);
    box-shadow: var(--examedge-shadow-md);
    padding: 2.5rem;
}
.examedge-exam-intro__title { font-size: 1.75rem; font-weight: 800; margin-bottom: 1rem; }
.examedge-exam-intro__stats { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.5rem 0; }
.examedge-exam-intro__stat {
    flex: 1;
    min-width: 120px;
    text-align: center;
    background: var(--examedge-bg);
    border-radius: var(--examedge-radius);
    padding: .875rem;
}
.examedge-exam-intro__stat-val { font-size: 1.5rem; font-weight: 700; color: var(--examedge-primary); }
.examedge-exam-intro__stat-lbl { font-size: .8125rem; color: var(--examedge-text-muted); }
.examedge-exam-intro__rules { list-style: disc; padding-left: 1.5rem; margin: 1rem 0; line-height: 1.8; color: var(--examedge-text-muted); }

/* Section instruction hint */
.examedge-select-instruction {
    font-size: .8125rem;
    color: var(--examedge-primary);
    font-weight: 600;
    margin-bottom: .75rem;
    padding: .375rem .75rem;
    background: #eff6ff;
    border-radius: var(--examedge-radius);
    display: inline-block;
}

/* Hint button */
.examedge-hint-btn { font-size: .8125rem; color: var(--examedge-text-muted); background: none; border: none; cursor: pointer; padding: 0; }
.examedge-hint-btn:hover { color: var(--examedge-primary); }
.examedge-hint-box { display: none; margin-top: .625rem; padding: .625rem .875rem; background: #fffbeb; border-radius: var(--examedge-radius); border-left: 3px solid var(--examedge-warning); font-size: .875rem; color: #92400e; }
.examedge-hint-box--visible { display: block; }