/* Course Mates — Find classmates on your campus */

.course-mates-page {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding-bottom: 48px;
}

/* ─── Hero ─── */
.cm-hero {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 24px;
    border: 1px solid rgba(123, 47, 247, 0.2);
    box-shadow: var(--shadow-md);
}

.cm-hero-glow {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 100% at 0% 0%, rgba(123, 47, 247, 0.55), transparent 55%),
        radial-gradient(ellipse 60% 70% at 100% 100%, rgba(255, 77, 148, 0.45), transparent 50%),
        linear-gradient(128deg, #1a0f33 0%, #3b1578 42%, #6d28d9 100%);
    pointer-events: none;
}

[data-theme="dark"] .cm-hero-glow {
    background:
        radial-gradient(ellipse 80% 100% at 0% 0%, rgba(123, 47, 247, 0.4), transparent 55%),
        radial-gradient(ellipse 60% 70% at 100% 100%, rgba(255, 77, 148, 0.3), transparent 50%),
        linear-gradient(128deg, #0a0612 0%, #150d28 40%, #2d1b4e 100%);
}

.cm-hero-pattern {
    position: absolute;
    right: 8%;
    top: 50%;
    transform: translateY(-50%);
    font-size: clamp(72px, 12vw, 120px);
    opacity: 0.08;
    pointer-events: none;
    line-height: 1;
    user-select: none;
}

.cm-hero-inner {
    position: relative;
    z-index: 1;
    padding: 28px 32px 30px;
    color: #fff;
}

.cm-hero-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.cm-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 6px;
}

.cm-hero-eyebrow::before {
    content: '';
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #ff4d94, rgba(255, 255, 255, 0.5));
}

.cm-hero-title-block h1 {
    font-size: clamp(26px, 4vw, 34px);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0;
    line-height: 1.12;
    color: #fff;
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .cm-hero-title-block h1 {
        background: linear-gradient(135deg, #ffffff 0%, #e9d5ff 50%, #fbcfe8 100%);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        color: transparent;
    }
}

.cm-hero-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 10px 18px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    white-space: nowrap;
    backdrop-filter: blur(8px);
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    flex-shrink: 0;
}

.cm-hero-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.cm-hero-link--accent {
    background: rgba(255, 77, 148, 0.3);
    border-color: rgba(255, 77, 148, 0.5);
}

.cm-hero-desc {
    font-size: 15px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.82);
    max-width: 540px;
    margin: 0 0 18px;
}

.cm-hero-hint {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    margin: 0;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.1);
    max-width: 420px;
}

.cm-hero-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 10px;
}

.cm-hero-campus {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.cm-hero-campus-icon {
    font-size: 20px;
    line-height: 1;
    flex-shrink: 0;
}

.cm-hero-campus-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.cm-hero-campus-text strong {
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.cm-hero-campus-full {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.35;
}

.cm-hero-stat {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.14);
    min-width: 96px;
}

.cm-hero-stat-value {
    font-size: 26px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
}

.cm-hero-stat-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.55);
    margin-top: 4px;
}

.cm-toast {
    margin-bottom: 16px;
}

/* ─── Layout ─── */
.cm-body {
    display: grid;
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 22px;
    align-items: start;
}

.cm-sidebar {
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: sticky;
    top: calc(var(--topbar-height) + 12px);
    max-height: calc(100vh - var(--topbar-height) - 24px);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
}

.cm-main {
    min-width: 0;
}

/* ─── Panels ─── */
.cm-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.cm-setup {
    border-color: rgba(255, 77, 148, 0.35);
    box-shadow: 0 0 0 1px rgba(255, 77, 148, 0.08), var(--shadow-sm);
}

.cm-panel-head {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.cm-panel-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(123, 47, 247, 0.15), rgba(255, 77, 148, 0.1));
    border: 1px solid rgba(123, 47, 247, 0.12);
}

.cm-panel-head h2 {
    font-size: 16px;
    font-weight: 800;
    margin: 0 0 3px;
    color: var(--text-dark);
    letter-spacing: -0.01em;
}

.cm-panel-head p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.45;
    margin: 0;
}

/* ─── Your profile ─── */
.cm-you-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.cm-you-avatar .user-avatar {
    width: 52px;
    height: 52px;
    font-size: 22px;
    border: 2px solid rgba(123, 47, 247, 0.25);
}

.cm-you-label {
    display: block;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 3px;
}

.cm-you-info strong {
    display: block;
    font-size: 15px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.cm-profile-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cm-profile-pill {
    display: inline-flex;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    background: rgba(123, 47, 247, 0.1);
    color: var(--primary);
    border: 1px solid rgba(123, 47, 247, 0.18);
}

.cm-profile-pill--muted {
    background: var(--background);
    color: var(--text-muted);
    border-color: var(--border);
    font-weight: 600;
}

.cm-profile-edit {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.cm-profile-edit summary {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    cursor: pointer;
    list-style: none;
    user-select: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.cm-profile-edit summary::after {
    content: '▾';
    font-size: 10px;
    opacity: 0.7;
    transition: transform 0.2s;
}

.cm-profile-edit[open] summary::after {
    transform: rotate(180deg);
}

.cm-profile-edit summary::-webkit-details-marker {
    display: none;
}

.cm-profile-edit[open] summary {
    margin-bottom: 12px;
}

/* ─── Forms ─── */
.cm-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cm-form--compact {
    gap: 10px;
}

.cm-field span {
    display: block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    color: var(--text-muted);
}

.cm-field select {
    max-width: 100%;
    box-sizing: border-box;
    width: 100%;
    min-height: 46px;
    padding: 11px 38px 11px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    background-color: var(--input-bg);
    color: var(--text-dark);
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    cursor: pointer;
}

.cm-field select:hover {
    border-color: rgba(123, 47, 247, 0.35);
}

.cm-field select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(123, 47, 247, 0.15);
}

.cm-school-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    border-radius: var(--radius-md);
    background: var(--background);
    border: 1px solid var(--border);
    min-height: 46px;
}

.cm-school-chip--empty {
    border-style: dashed;
    background: rgba(123, 47, 247, 0.04);
}

.cm-school-chip--empty .cm-school-chip-text {
    color: var(--text-muted);
    font-weight: 600;
}

.cm-school-chip-icon {
    font-size: 18px;
    line-height: 1;
    flex-shrink: 0;
}

.cm-school-chip-text {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.35;
    word-break: break-word;
}

.cm-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1.45;
    padding: 4px 0;
}

.cm-check input {
    width: 18px;
    height: 18px;
    margin-top: 1px;
    flex-shrink: 0;
    accent-color: var(--primary);
    cursor: pointer;
}

.cm-form-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 2px;
}

.cm-form-actions .btn-primary,
.cm-form-actions .btn-secondary,
.cm-form-submit {
    width: 100%;
    justify-content: center;
    text-align: center;
}

.cm-link-muted {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    text-align: center;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}

.cm-link-muted:hover {
    color: var(--primary);
    background: rgba(123, 47, 247, 0.06);
}

/* ─── Results header ─── */
.cm-results-head {
    margin-bottom: 18px;
    padding: 16px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.cm-results-head h2 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-dark);
    margin: 0 0 6px;
    letter-spacing: -0.02em;
}

.cm-results-count {
    color: var(--primary);
}

.cm-results-sub {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 0;
}

.cm-results-tag {
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--background);
    border: 1px solid var(--border);
    color: var(--text-muted);
}

/* ─── Grid ─── */
.course-mates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

/* ─── Mate cards ─── */
.course-mate-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s, border-color 0.2s, transform 0.18s;
}

.course-mate-card:hover {
    border-color: rgba(123, 47, 247, 0.3);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.course-mate-card-accent {
    height: 3px;
    background: var(--gradient-primary);
    flex-shrink: 0;
}

.course-mate-card-link {
    display: flex;
    gap: 14px;
    padding: 18px 18px 14px;
    color: inherit;
    text-decoration: none;
    flex: 1;
    min-width: 0;
}

.course-mate-avatar {
    flex-shrink: 0;
}

.course-mate-avatar .user-avatar {
    width: 52px;
    height: 52px;
    font-size: 22px;
    border: 2px solid rgba(123, 47, 247, 0.2);
    background: var(--background);
}

.course-mate-body {
    flex: 1;
    min-width: 0;
}

.course-mate-title-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 8px;
    margin-bottom: 4px;
}

.course-mate-body h3 {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    font-size: 15px;
    font-weight: 800;
    margin: 0;
    color: var(--text-dark);
    transition: color 0.15s;
    word-break: break-word;
}

.course-mate-card:hover .course-mate-body h3 {
    color: var(--primary);
}

.course-mate-campus {
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    padding: 3px 8px;
    border-radius: 999px;
    background: rgba(123, 47, 247, 0.08);
    border: 1px solid rgba(123, 47, 247, 0.14);
    white-space: nowrap;
}

.course-mate-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    margin: 0 0 10px;
}

.course-mate-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
    padding: 0;
    margin: 0 0 10px;
}

.course-mate-tag {
    font-size: 11px;
    font-weight: 700;
    padding: 4px 9px;
    border-radius: 8px;
    line-height: 1.25;
}

.course-mate-tag--faculty {
    background: rgba(123, 47, 247, 0.1);
    color: var(--primary);
    border: 1px solid rgba(123, 47, 247, 0.16);
}

.course-mate-tag--level {
    background: rgba(255, 77, 148, 0.1);
    color: #c2185b;
    border: 1px solid rgba(255, 77, 148, 0.2);
}

[data-theme="dark"] .course-mate-tag--level {
    color: #f9a8d4;
}

.course-mate-tag--course {
    background: var(--background);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.course-mate-bio {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-mate-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px 14px 14px;
    border-top: 1px solid var(--border);
    background: var(--background);
}

.course-mate-btn-message {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.course-mate-btn-message svg {
    flex-shrink: 0;
}

.course-mate-actions .btn-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 12px;
    font-size: 12px;
    font-weight: 700;
    border-radius: var(--radius-md);
    white-space: nowrap;
}

.course-mate-actions .btn-primary {
    color: #fff;
}

/* ─── Empty state ─── */
.cm-empty {
    text-align: center;
    padding: 56px 28px;
    background: var(--surface);
    border: 1px dashed rgba(123, 47, 247, 0.25);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.cm-empty-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin: 0 auto 18px;
    font-size: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(123, 47, 247, 0.12), rgba(255, 77, 148, 0.1));
    border: 1px solid rgba(123, 47, 247, 0.15);
}

.cm-empty h3 {
    font-size: 20px;
    font-weight: 800;
    margin: 0 0 8px;
    color: var(--text-dark);
    letter-spacing: -0.02em;
}

.cm-empty p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.55;
    max-width: 360px;
    margin: 0 auto 20px;
}

.cm-empty-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.cm-empty-actions .btn-primary,
.cm-empty-actions .btn-secondary {
    min-width: 140px;
}

/* ─── Tablet / mobile ─── */
@media (max-width: 960px) {
    .cm-body {
        grid-template-columns: 1fr;
    }

    .cm-sidebar {
        position: static;
        max-height: none;
        overflow: visible;
    }

    .cm-setup {
        order: -1;
    }

    .cm-you {
        order: 0;
    }

    .cm-filters {
        order: 1;
    }
}

@media (max-width: 640px) {
    .course-mates-page {
        padding-bottom: 32px;
    }

    .cm-hero-inner {
        padding: 22px 18px 24px;
    }

    .cm-hero-pattern {
        right: -10%;
        opacity: 0.05;
    }

    .cm-hero-top {
        flex-direction: column;
        align-items: stretch;
    }

    .cm-hero-link {
        width: 100%;
    }

    .cm-hero-meta {
        flex-direction: column;
    }

    .cm-hero-stat {
        flex-direction: row;
        align-items: center;
        gap: 10px;
    }

    .cm-hero-stat-label {
        margin-top: 0;
    }

    .cm-panel {
        padding: 16px;
    }

    .platform-body {
        padding-left: 16px;
        padding-right: 16px;
    }

    .course-mates-grid {
        grid-template-columns: 1fr;
    }

    .course-mate-card-link {
        padding: 16px;
    }

    .course-mate-actions {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 400px) {
    .course-mate-title-row {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Legacy — hide old markup if present */
.course-mates-header,
.course-mates-setup,
.course-mates-filters,
.course-mates-empty,
.cm-card,
.cm-card-head,
.cm-card-icon,
.cm-setup-form,
.cm-form-grid,
.cm-filter-grid,
.cm-filter-form,
.cm-filter-actions,
.cm-clear-link,
.cm-profile-summary,
.cm-profile-summary-inner,
.cm-profile-summary-meta,
.cm-profile-edit-details,
.cm-results-header,
.cm-results-filters {
    display: none !important;
}