/* shared.css — Common base styles for IELTS Practice Portal pages */
/* Used by: practice_portal.php, practice.php */

/* =========================================
   CSS RESET & BASE
   ========================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* =========================================
   BUTTONS
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary, #3b82f6), var(--primary-dark, #2563eb));
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
    background: rgba(255,255,255,0.06);
    color: #e2e8f0;
    border: 1px solid var(--border-color, rgba(255,255,255,0.09));
}
.btn-secondary:hover {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border-color: rgba(255,255,255,0.2);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
    background: rgba(239, 68, 68, 0.25);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.82rem;
}

/* =========================================
   FORM CONTROLS
   ========================================= */
.form-control {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color, #334155);
    border-radius: 10px;
    color: #fff;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary, #3b82f6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

textarea.form-control {
    resize: vertical;
    line-height: 1.6;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted, #94a3b8);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* =========================================
   ALERTS
   ========================================= */
.alert {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.88rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

/* =========================================
   SKILL / STATUS BADGES
   ========================================= */
.skill-badge {
    padding: 5px 12px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.skill-badge.listening { background: rgba(59, 130, 246, 0.2); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
.skill-badge.reading { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.skill-badge.writing { background: rgba(139, 92, 246, 0.2); color: #c084fc; border: 1px solid rgba(139, 92, 246, 0.3); }

.skill-tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.skill-tag.listening { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.skill-tag.reading { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.skill-tag.writing { background: rgba(139, 92, 246, 0.15); color: #c084fc; }

.badge-band {
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* =========================================
   TABLES
   ========================================= */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

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

.custom-table th,
.custom-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--border-color, #334155);
}

.custom-table th {
    background: rgba(15, 23, 42, 0.8);
    color: var(--text-muted, #94a3b8);
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
}

.custom-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* =========================================
   EMPTY STATES
   ========================================= */
.empty-state {
    text-align: center;
    color: var(--text-muted, #94a3b8);
    padding: 60px 20px;
    background: var(--bg-card, #1e293b);
    border-radius: 16px;
    border: 1px dashed var(--border-color, #334155);
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-muted, #94a3b8);
    margin-bottom: 16px;
    display: block;
}

/* =========================================
   UTILITY
   ========================================= */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* =========================================
   ANIMATION
   ========================================= */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =========================================
   UNIFIED PORTAL USER CHIP & STATUS BADGE
   ========================================= */
.portal-user-chip {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-family: inherit;
    font-size: 0.85rem;
    color: #e2e8f0;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.portal-user-chip.role-admin {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(168, 85, 247, 0.15));
    border-color: rgba(245, 158, 11, 0.35);
}
.portal-user-chip.role-teacher {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(59, 130, 246, 0.15));
    border-color: rgba(16, 185, 129, 0.35);
}
.portal-user-chip.role-student {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.25);
}
.portal-user-chip.role-guest {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}
.portal-user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}
.role-admin .portal-user-avatar { background: #f59e0b; color: #0f172a; }
.role-teacher .portal-user-avatar { background: #10b981; color: #0f172a; }
.role-student .portal-user-avatar { background: #3b82f6; color: #fff; }
.role-guest .portal-user-avatar { background: rgba(255, 255, 255, 0.1); color: #94a3b8; }

.portal-user-meta {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
    text-align: left;
}
.portal-user-name {
    font-weight: 600;
    color: #fff;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.portal-role-pill {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.03em;
}
.role-admin .portal-role-pill { background: rgba(245, 158, 11, 0.25); color: #fbbf24; }
.role-teacher .portal-role-pill { background: rgba(16, 185, 129, 0.25); color: #34d399; }
.role-student .portal-role-pill { background: rgba(59, 130, 246, 0.25); color: #93c5fd; }
.role-guest .portal-role-pill { background: rgba(255, 255, 255, 0.1); color: #94a3b8; }

.portal-user-status {
    font-size: 0.72rem;
    color: #94a3b8;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 1px;
}
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}
.dot-active { background: #10b981; box-shadow: 0 0 6px rgba(16, 185, 129, 0.6); }
.dot-guest { background: #94a3b8; }

.portal-header-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.08);
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.75rem;
    transition: all 0.15s ease;
}
.portal-header-action-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}
.portal-header-action-btn.logout:hover {
    background: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}
.portal-header-login-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--primary, #3b82f6);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.15s ease;
}
.portal-header-login-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}