:root {
    --nav-bg: #ffffff;
    --nav-border: #e5e7eb;
    --nav-height: 56px;
    --bg-color: #f3f4f6;
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --link-color: #4f46e5;
    --link-hover-color: #3730a3;
    --accent-color: #4f46e5;
    --accent-hover: #3730a3;
    --alert-bg: #ede9fe;
    --alert-success-bg: #dcfce7;
    --alert-danger-bg: #fee2e2;
    --border-radius: 5px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--text-color);
    font-family: 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--bg-color);
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover-color);
}

/* ── Navbar ── */

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--nav-bg);
    height: var(--nav-height);
    padding: 0 1.25rem;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.navbar-logo {
    height: 28px;
    width: 28px;
    vertical-align: middle;
    margin-right: 0.4rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-color);
    white-space: nowrap;
    flex-shrink: 0;
}

.navbar-brand:hover {
    color: var(--link-hover-color);
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0.4rem 0.6rem;
    border-radius: var(--border-radius);
    flex-shrink: 0;
}

.navbar-toggle:hover {
    background-color: rgba(0, 0, 0, 0.06);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    justify-content: space-between;
    margin-left: 1.5rem;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.navbar-account {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.navbar-link {
    color: var(--text-color);
    padding: 0.4rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: background-color 0.15s;
}

.navbar-link:hover {
    background-color: rgba(0, 0, 0, 0.06);
    color: var(--text-color);
}

.navbar-link--accent {
    background-color: var(--accent-color);
    color: #fff;
}

.navbar-link--accent:hover {
    background-color: var(--accent-hover);
    color: #fff;
}

.navbar-username {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ── Mobile navbar ── */

@media (max-width: 640px) {
    .navbar-toggle {
        display: block;
    }

    .navbar-menu {
        display: none;
        flex-direction: column;
        align-items: stretch;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background-color: var(--nav-bg);
        padding: 0.75rem 1rem 1rem;
        margin-left: 0;
        gap: 0.5rem;
        border-top: 1px solid var(--nav-border);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .navbar-menu.is-open {
        display: flex;
    }

    .navbar-links {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        border-bottom: 1px solid var(--nav-border);
        padding-bottom: 0.75rem;
    }

    .navbar-account {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        padding-top: 0.25rem;
    }

    .navbar-link {
        display: block;
        padding: 0.6rem 0.75rem;
    }

    .navbar-link--accent {
        text-align: center;
    }
}

/* ── Main content ── */

.main-content {
    max-width: 960px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem;
}

/* ── Alerts ── */

.alert {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--alert-bg);
    color: var(--text-color);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.alert--success {
    background-color: var(--alert-success-bg);
}

.alert--danger {
    background-color: var(--alert-danger-bg);
}

.alert i.fa-xmark {
    cursor: pointer;
    margin-left: 1rem;
    opacity: 0.6;
    flex-shrink: 0;
}

.alert i.fa-xmark:hover {
    opacity: 1;
}

.rank-info {
    gap: 20px;
    background: #fff;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-top: 16px;
}

.rank-info > h1 {
    margin-top: 0;
    font-size: 1.6rem;
}

/* ── Profile ── */

.profile-info {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: #fff;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.profile-info__avatar {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: #fff;
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.profile-info__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-info__name {
    margin: 0 0 0.2rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.profile-info__meta {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.profile-edit {
    background: #fff;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.profile-edit h2 {
    margin: 0 0 1.25rem;
    font-size: 1rem;
    font-weight: 600;
}

/* ── Form utilities ── */

.form-field {
    margin-bottom: 1rem;
}

.form-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.35rem;
    text-decoration: underline;
}

.form-hint {
    margin: 0.3rem 0 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-error {
    margin: 0.3rem 0 0;
    font-size: 0.8rem;
    color: #dc2626;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--nav-border);
}

/* ── Challenges ── */

.challenges-section {
    background: #fff;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.challenges-section__title {
    margin: 0 0 1rem;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.challenge-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.challenge-card {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    background: var(--bg-color);
}

.challenge-card__avatar {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--accent-color);
}

.challenge-card__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.challenge-card__body {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.challenge-card__who {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
}

.challenge-card__message {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-color);
    white-space: pre-wrap;
    word-break: break-word;
}

.challenge-card__date {
    margin: 0;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.challenges-empty {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-color);
    background: #fff;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 1px;
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s;
    text-decoration: none;
}

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

.profile-info__details {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
    flex: 1;
    min-width: 0;
}

.btn-challenge {
    margin-left: auto;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: #fff;
    color: var(--text-color);
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    padding: 0.4rem 0.9rem;
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.15s;
}

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

.btn-danger {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background-color: #dc2626;
    color: #fff;
    border: none;
    border-radius: var(--border-radius);
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

/* ── Match list ── */

.match-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.match-card {
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    background: var(--bg-color);
    overflow: hidden;
}

.match-card__link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
}

.match-card__link:hover {
    background-color: #e9eaf0;
    color: var(--text-color);
}

.match-card__players {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.match-card__player {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex: 1;
}

.match-card__player--right {
    justify-content: flex-end;
}


.match-card__avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--accent-color);
    flex-shrink: 0;
}

.match-card__rank {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.match-card__score {
    font-size: 1rem;
    font-weight: 700;
    white-space: nowrap;
    padding: 0 0.5rem;
    color: var(--accent-color);
}

.match-card__meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.35rem;
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ── Badges ── */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge--verified {
    background: #dcfce7;
    color: #166534;
}

.badge--unverified {
    background: #fef9c3;
    color: #854d0e;
}

/* ── Match detail ── */

.match-detail__players {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.match-detail__player {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 140px;
}

.match-detail__player--right {
    justify-content: flex-end;
    flex-direction: row-reverse;
}

.match-detail__sets {
    flex: 2;
    overflow-x: auto;
}

.match-score-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.9rem;
    text-align: center;
}

.match-score-table th,
.match-score-table td {
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--nav-border);
}

.match-score-table th {
    background: var(--bg-color);
    font-weight: 600;
    font-size: 0.8rem;
}

.match-score-table__name {
    text-align: left;
    font-weight: 500;
    white-space: nowrap;
}

.match-score-table__win {
    font-weight: 700;
    color: var(--accent-color);
}

.match-detail__winner-badge {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-color);
}

.match-detail__footer {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--nav-border);
}

/* ── Record match form ── */

.match-sets {
    margin-bottom: 0.75rem;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.match-sets__header {
    display: grid;
    grid-template-columns: 2rem 1fr 1fr 2rem;
    gap: 0.5rem;
    align-items: center;
    padding: 0.4rem 0.75rem;
    background: var(--bg-color);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--nav-border);
}

.match-sets__row {
    display: grid;
    grid-template-columns: 2rem 1fr 1fr 2rem;
    gap: 0.5rem;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--nav-border);
}

.match-sets__row:last-child {
    border-bottom: none;
}

.match-sets__num {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-input-small {
    width: 100%;
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-color);
    background: #fff;
    text-align: center;
}

.form-input-small:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 1px;
}

.match-sets__remove {
    background: none;
    border: none;
    color: #dc2626;
    cursor: pointer;
    padding: 0.2rem;
    font-size: 0.85rem;
    opacity: 0.6;
    transition: opacity 0.15s;
}

.match-sets__remove:hover {
    opacity: 1;
}

.match-sets__actions {
    margin: 0.5rem 0 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.match-sets__row--tb {
    background: var(--bg-color);
}

.match-sets__num--tb {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.05em;
}

.tb-toggle {
    grid-column: 2 / 4;
    display: flex;
    gap: 0.4rem;
}

.tb-btn {
    flex: 1;
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--nav-border);
    border-radius: var(--border-radius);
    background: #fff;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    color: var(--text-color);
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.tb-btn--active {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
    font-weight: 600;
}