/* MIR Study 2.0 — Clean, functional CSS */

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #16a34a;
    --error: #dc2626;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 8px;
}

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

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

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}
.nav-brand { font-weight: 700; font-size: 1.1rem; color: var(--primary); text-decoration: none; }
.nav-right { display: flex; align-items: center; gap: 1rem; }
.nav-user { color: var(--text-muted); font-size: 0.9rem; }
.nav-link { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; }
.nav-link:hover { color: var(--error); }

/* Container */
.container { max-width: 800px; margin: 1.5rem auto; padding: 0 1rem; }

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.login-card { max-width: 400px; margin: 4rem auto; text-align: center; }
.login-card h1 { margin-bottom: 0.25rem; }
.login-card .subtitle { color: var(--text-muted); margin-bottom: 1.5rem; }

/* Forms */
.form-group { margin-bottom: 1rem; text-align: left; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.25rem; font-size: 0.9rem; }
.form-group small { color: var(--text-muted); font-size: 0.8rem; }
input[type="text"], input[type="password"], select {
    width: 100%; padding: 0.6rem; border: 1px solid var(--border);
    border-radius: var(--radius); font-size: 1rem;
}

/* Buttons */
.btn {
    display: inline-block; padding: 0.6rem 1.2rem; border-radius: var(--radius);
    font-size: 0.95rem; font-weight: 600; text-decoration: none; border: none; cursor: pointer;
    transition: background 0.15s;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-muted); }
.btn-full { width: 100%; }
.btn-lg { padding: 0.8rem 2rem; font-size: 1.1rem; }

/* Stats grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.stat-card {
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1rem; text-align: center;
}
.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat-value.stat-positive { color: var(--success); }
.stat-value.stat-negative { color: var(--error); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* Tables */
.table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; font-size: 0.9rem; }
.table th, .table td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
.table th { font-weight: 600; color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; }

/* Badges */
.badge {
    display: inline-block; padding: 0.2rem 0.6rem; border-radius: 99px;
    font-size: 0.8rem; font-weight: 600; background: var(--primary); color: white;
}
.badge-secondary { background: var(--border); color: var(--text); }

/* Question */
.question-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.session-progress { margin-left: auto; font-size: 0.85rem; color: var(--text-muted); }
.question-card { padding: 1.5rem; }
.stem { font-size: 1.05rem; margin-bottom: 1.5rem; line-height: 1.7; white-space: pre-line; }

/* Options */
.options { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; }
.option-label {
    display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.75rem;
    border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer;
    transition: border-color 0.15s;
}
.option-label:hover { border-color: var(--primary); }
.option-label input[type="radio"] { margin-top: 0.2rem; }
.option-letter { font-weight: 700; min-width: 1.5rem; color: var(--primary); }
.option-text { flex: 1; }

/* Feedback options (non-interactive) */
.option-result {
    display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.75rem;
    border: 1px solid var(--border); border-radius: var(--radius);
}
.option-correct { border-color: var(--success); background: #f0fdf4; }
.option-incorrect { border-color: var(--error); background: #fef2f2; }
.option-icon { margin-left: auto; font-weight: 700; }
.option-correct .option-icon { color: var(--success); }
.option-incorrect .option-icon { color: var(--error); }

/* Feedback box */
.feedback-box {
    padding: 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: 0.95rem;
}
.feedback-correct { background: #f0fdf4; border: 1px solid var(--success); }
.feedback-incorrect { background: #fef2f2; border: 1px solid var(--error); }
.feedback-meta { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.5rem; }

.explanation { padding: 1rem; background: #f1f5f9; border-radius: var(--radius); margin-bottom: 1rem; }
.explanation p { margin-top: 0.5rem; }

.form-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.actions { margin: 1.5rem 0; }

/* Energy/Confidence selectors */
.energy-selector, .confidence-selector { display: flex; gap: 0.5rem; margin: 0.5rem 0; }
.energy-option, .confidence-option { cursor: pointer; }
.energy-option input, .confidence-option input { display: none; }
.energy-label, .confidence-label {
    display: inline-block; width: 2.5rem; height: 2.5rem; line-height: 2.5rem;
    text-align: center; border: 2px solid var(--border); border-radius: var(--radius);
    font-weight: 700; transition: all 0.15s;
}
.energy-option input:checked + .energy-label,
.confidence-option input:checked + .confidence-label {
    border-color: var(--primary); background: var(--primary); color: white;
}
.confidence-group { margin-top: 1rem; }

/* Alerts */
.alert { padding: 0.75rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: 0.9rem; }
.alert-error { background: #fef2f2; color: var(--error); border: 1px solid var(--error); }

/* Calendar */
.calendar-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.calendar-header h1 { flex: 1; text-align: center; }
.calendar-table td, .calendar-table th { font-size: 0.85rem; }
.today-row { background: #eff6ff; }
.guard-row { background: #fef2f2; opacity: 0.7; }
.shift-badge {
    display: inline-block; padding: 0.15rem 0.5rem; border-radius: 99px;
    font-size: 0.75rem; font-weight: 600;
}
.shift-day_shift { background: #fef3c7; color: #92400e; }
.shift-night_shift { background: #e0e7ff; color: #3730a3; }
.shift-extended_guard { background: #fecaca; color: #991b1b; }
.shift-post_shift { background: #fde68a; color: #78350f; }
.shift-free_day_1, .shift-free_day_2 { background: #d1fae5; color: #065f46; }
.adherence-bar {
    padding: 0.5rem 1rem; background: #f1f5f9; border-radius: var(--radius);
    margin-bottom: 1rem; font-size: 0.9rem;
}
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.8rem; }

/* Weekly plan */
.day-plan { margin-bottom: 0.75rem; padding: 1rem; }
.today-highlight { border-left: 4px solid var(--primary); }
.day-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.5rem; }
.day-hours { margin-left: auto; color: var(--text-muted); font-size: 0.9rem; }
.day-description { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.5rem; }
.task-list { list-style: none; padding: 0; }
.task-list li { padding: 0.3rem 0; font-size: 0.9rem; }
.task-type {
    display: inline-block; padding: 0.1rem 0.4rem; background: var(--border);
    border-radius: 4px; font-size: 0.75rem; font-weight: 600; margin-right: 0.5rem;
}
.focus-subjects { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.5rem; }

/* Exam simulation */
.exam-bar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.75rem 1rem; background: var(--card-bg); border: 1px solid var(--border);
    border-radius: var(--radius); margin-bottom: 1rem; position: sticky; top: 0; z-index: 10;
}
.exam-progress { font-weight: 600; }
.exam-timer {
    font-size: 1.3rem; font-weight: 700; font-family: monospace;
    padding: 0.3rem 0.8rem; background: #f1f5f9; border-radius: var(--radius);
}
.timer-warning { background: #fef2f2; color: var(--error); }
.exam-warning { margin-top: 1rem; color: var(--text-muted); font-size: 0.85rem; font-style: italic; }
.stats-grid-2 { grid-template-columns: repeat(2, 1fr); }

/* Calibration */
.miscalibrated-row { background: #fffbeb; }
.cal-bar-container {
    position: relative; height: 1rem; background: #f1f5f9;
    border-radius: 4px; min-width: 120px;
}
.cal-bar-actual {
    position: absolute; top: 0; left: 0; height: 100%;
    background: var(--primary); border-radius: 4px; opacity: 0.7;
}
.cal-bar-expected {
    position: absolute; top: -2px; width: 2px; height: calc(100% + 4px);
    background: var(--error);
}
.alert-info {
    padding: 0.75rem; border-radius: var(--radius); margin-bottom: 1rem;
    font-size: 0.9rem; background: #eff6ff; color: #1e40af; border: 1px solid #93c5fd;
}
/* Question images */
.question-image { margin: 1rem 0; text-align: center; }
.question-image img { max-width: 100%; max-height: 500px; border-radius: var(--radius); border: 1px solid var(--border); }
/* Flashcard styles */
.flashcard { text-align: center; padding: 2rem; min-height: 300px; display: flex; flex-direction: column; justify-content: center; }
.flashcard-front h2 { margin-bottom: 2rem; font-size: 1.3rem; }
.flashcard-back h2 { font-size: 1.1rem; color: var(--muted); }
.flashcard-answer { font-size: 1.2rem; padding: 1.5rem 0; line-height: 1.6; }
.flashcard-actions { margin-top: 1.5rem; }
.flashcard-buttons { display: flex; gap: 1rem; justify-content: center; margin-top: 0.5rem; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }
.btn-danger { background: var(--error); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
/* Data table */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { font-weight: 600; background: var(--bg); }
.stat-positive { color: var(--success); font-weight: 600; }
.stat-negative { color: var(--error); font-weight: 600; }
/* Flag & admin styles */
.btn-flag { font-size: 0.85rem; color: var(--muted); }
.flag-inline-form { margin-top: 0.75rem; padding: 0.75rem; background: var(--bg); border-radius: var(--radius); border: 1px solid var(--border); }
.flag-row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.flag-card { margin-bottom: 1.5rem; }
.flag-card.flag-resolved { opacity: 0.7; }
.flag-header { margin-bottom: 0.5rem; display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.flag-meta { font-size: 0.8rem; color: var(--muted); }
.flag-reason { margin: 0.5rem 0; padding: 0.5rem; background: #fef3c7; border-radius: var(--radius); }
.flag-resolved-info { margin: 0.5rem 0; padding: 0.5rem; background: #dcfce7; border-radius: var(--radius); }
.flag-actions { margin-top: 0.75rem; display: flex; flex-direction: column; gap: 0.5rem; }
.flag-form-inline { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.badge-flag { font-size: 0.75rem; }
.badge-wrong_answer { background: var(--error); color: #fff; }
.badge-outdated_answer { background: #f59e0b; color: #fff; }
.badge-ambiguous { background: #8b5cf6; color: #fff; }
.badge-bad_formatting { background: var(--muted); color: #fff; }
.badge-other { background: #64748b; color: #fff; }
.filter-bar { margin-bottom: 1rem; display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.btn-sm { font-size: 0.8rem; padding: 0.3rem 0.6rem; }
.nav-admin { color: #f59e0b !important; font-weight: 600; }