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

:root {
    --primary: #00BFA6;
    --primary-dark: #009688;
    --primary-light: #E0F7F3;
    --secondary: #FF6D00;
    --danger: #FF1744;
    --bg: #F0F4F8;
    --card: #ffffff;
    --text: #1A2332;
    --text-light: #607D8B;
    --border: #E0E6ED;
    --swim-color: #2979FF;
    --swim-bg: #E3F2FD;
    --bike-color: #FF9100;
    --bike-bg: #FFF3E0;
    --run-color: #FF1744;
    --run-bg: #FFEBEE;
    --other-color: #AA00FF;
    --other-bg: #F3E5F5;
    --gradient-sport: linear-gradient(135deg, #2979FF 0%, #00BFA6 50%, #FF6D00 100%);
    --gradient-card: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-swim: linear-gradient(135deg, #2979FF, #448AFF);
    --gradient-bike: linear-gradient(135deg, #FF9100, #FFB74D);
    --gradient-run: linear-gradient(135deg, #FF1744, #FF5252);
    --gradient-other: linear-gradient(135deg, #AA00FF, #CE93D8);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overscroll-behavior: none;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -30%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0,191,166,0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    bottom: -40%;
    left: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,109,0,0.05) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

#app {
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* 页面切换 */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* ========== 登录/注册页面 ========== */
#auth-page {
    display: none;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #0D47A1 0%, #00BFA6 40%, #FF6D00 100%);
    position: relative;
    overflow: hidden;
}

/* 登录页运动装饰元素 */
#auth-page::before {
    content: '🏊';
    position: absolute;
    top: 12%;
    left: 8%;
    font-size: 48px;
    opacity: 0.15;
    animation: floatUp 6s ease-in-out infinite;
}

#auth-page::after {
    content: '🏃';
    position: absolute;
    bottom: 18%;
    right: 10%;
    font-size: 42px;
    opacity: 0.15;
    animation: floatUp 8s ease-in-out infinite reverse;
}

@keyframes floatUp {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

#auth-page.active {
    display: flex;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo-icon {
    font-size: 52px;
    display: block;
    margin-bottom: 12px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo h1 {
    font-size: 26px;
    color: var(--text);
    margin-bottom: 8px;
    background: var(--gradient-sport);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.subtitle {
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: 2px;
}

.auth-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border);
    gap: 4px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: none;
    font-size: 16px;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    font-weight: 500;
}

.tab-btn.active {
    color: var(--primary);
    font-weight: 700;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--gradient-sport);
    border-radius: 3px 3px 0 0;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--text-light);
    font-weight: 600;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: all 0.3s;
    background: #FAFBFC;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(0,191,166,0.1);
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

@media (max-width: 320px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--gradient-sport);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-block {
    width: 100%;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 14px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.2s;
}

.btn-text:hover {
    background: rgba(0,0,0,0.05);
}

/* ========== 主页面 ========== */
#main-page {
    min-height: 100vh;
    padding-bottom: calc(76px + env(safe-area-inset-bottom));
}

/* 顶部导航 */
.header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
    z-index: 100;
}

.logo-small {
    font-size: 22px;
    letter-spacing: 2px;
}

.header-center {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
}

/* 底部标签导航 */
.tab-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    justify-content: space-around;
    padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
    box-shadow: 0 -2px 16px rgba(0,0,0,0.06);
    z-index: 100;
}

.nav-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 10px;
    border: none;
    background: none;
    color: var(--text-light);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    border-radius: 8px;
}

.nav-tab.active {
    color: var(--primary);
}

.nav-tab.active .nav-icon {
    transform: scale(1.15);
}

.nav-icon {
    font-size: 22px;
    margin-bottom: 2px;
    transition: transform 0.3s;
}

.nav-label {
    font-size: 10px;
    font-weight: 600;
}

/* 内容区域 */
.content {
    padding: 16px;
}

.section {
    display: none;
}

.section.active {
    display: block;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-title {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--text);
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 22px;
    background: var(--gradient-sport);
    border-radius: 4px;
}

/* ========== 打卡页面 ========== */

/* 打卡英雄区 - 背景照片横幅 */
.checkin-hero {
    position: relative;
    width: calc(100% + 32px);
    margin-left: -16px;
    margin-bottom: 20px;
    height: 200px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    overflow: hidden;
}

.checkin-hero-bg {
    position: absolute;
    inset: 0;
    background: url('bg-checkin.png') center center / cover no-repeat;
    /* 如果图片加载失败，显示渐变备用背景 */
    background-color: var(--gradient-sport);
}

.checkin-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.45) 70%, rgba(0,0,0,0.65) 100%);
}

.checkin-hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
    padding: 20px 24px 24px;
}

.checkin-hero-title {
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.checkin-hero-subtitle {
    font-size: 13px;
    color: rgba(255,255,255,0.85);
    text-shadow: 0 1px 6px rgba(0,0,0,0.3);
    letter-spacing: 0.5px;
}

.sport-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

@media (max-width: 360px) {
    .sport-selector {
        grid-template-columns: repeat(2, 1fr);
    }
}

.sport-btn {
    padding: 14px 8px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--card);
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    position: relative;
    overflow: hidden;
}

.sport-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: transparent;
    transition: all 0.3s;
}

.sport-btn.active {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.sport-btn[data-sport="swim"].active {
    border-color: var(--swim-color);
    background: var(--swim-bg);
}
.sport-btn[data-sport="swim"].active::after {
    background: var(--gradient-swim);
}

.sport-btn[data-sport="bike"].active {
    border-color: var(--bike-color);
    background: var(--bike-bg);
}
.sport-btn[data-sport="bike"].active::after {
    background: var(--gradient-bike);
}

.sport-btn[data-sport="run"].active {
    border-color: var(--run-color);
    background: var(--run-bg);
}
.sport-btn[data-sport="run"].active::after {
    background: var(--gradient-run);
}

.sport-btn[data-sport="other"].active {
    border-color: var(--other-color);
    background: var(--other-bg);
}
.sport-btn[data-sport="other"].active::after {
    background: var(--gradient-other);
}

.sport-icon {
    font-size: 30px;
    margin-bottom: 4px;
}

.sport-name {
    font-size: 13px;
    font-weight: 600;
}

.recent-checkins {
    margin-top: 24px;
}

.recent-checkins h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-light);
    font-weight: 700;
}

.checkin-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkin-item {
    background: var(--card);
    padding: 14px 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid transparent;
    transition: all 0.2s;
}

.checkin-item[data-sport="swim"] { border-left-color: var(--swim-color); }
.checkin-item[data-sport="bike"] { border-left-color: var(--bike-color); }
.checkin-item[data-sport="run"] { border-left-color: var(--run-color); }
.checkin-item[data-sport="other"] { border-left-color: var(--other-color); }

.checkin-sport {
    font-size: 30px;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    flex-shrink: 0;
}

.checkin-info {
    flex: 1;
    min-width: 0;
}

.checkin-distance {
    font-size: 16px;
    font-weight: 700;
}

.checkin-meta {
    font-size: 12px;
    color: var(--text-light);
}

.checkin-date {
    font-size: 12px;
    color: var(--text-light);
}

.checkin-item-actions {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
}

.checkin-item-actions .btn-icon {
    width: 30px;
    height: 30px;
    font-size: 15px;
}

.admin-member-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-dark);
    padding: 10px 4px 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}

/* ========== 全队统计/计划表格 ========== */
.team-section-title {
    font-size: 17px;
    font-weight: 800;
    color: var(--text);
    margin: 28px 0 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: 6px;
}

.team-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 16px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.team-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    font-size: 13px;
    min-width: 420px;
}

.team-table thead tr {
    background: var(--gradient-sport);
    color: #fff;
}

.team-table th {
    padding: 12px 10px;
    text-align: center;
    font-weight: 700;
    white-space: nowrap;
    font-size: 12px;
    letter-spacing: 0.5px;
}

.team-table tbody tr {
    border-bottom: 1px solid #F0F4F8;
    transition: background 0.15s;
}

.team-table tbody tr:nth-child(even) {
    background: #FAFBFC;
}

.team-table tbody tr:hover {
    background: var(--primary-light);
}

.team-table td {
    padding: 10px 8px;
    text-align: center;
    vertical-align: middle;
    color: var(--text);
    line-height: 1.4;
}

.team-table td small {
    display: block;
    color: var(--text-light);
    font-size: 11px;
}

.team-table td.team-name {
    font-weight: 700;
    text-align: left;
    color: var(--primary-dark);
    white-space: nowrap;
}

.team-table td.team-total {
    font-weight: 800;
    color: var(--secondary);
}

/* 计划表格专属 */
.plan-table td.team-name {
    min-width: 60px;
}

.plan-row-done td {
    color: #888;
}

.plan-row-done td.team-name {
    color: #aaa;
}

.plan-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.plan-badge.done {
    background: #E8F5E9;
    color: #2E7D32;
}

.plan-badge.pending {
    background: #FFF8E1;
    color: #F57F17;
}

.plan-note-sm {
    color: var(--text-light);
    font-size: 11px;
}

/* ========== 目标页面 ========== */
.goal-period-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.period-btn {
    flex: 1;
    padding: 10px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--card);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.period-btn.active {
    background: var(--gradient-sport);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

#goals-container {
    margin-bottom: 24px;
}

.goal-card {
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 18px;
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary);
    transition: all 0.2s;
}

.goal-card:hover {
    box-shadow: var(--shadow-md);
}

.goal-card.swim-goal { border-left-color: var(--swim-color); }
.goal-card.bike-goal { border-left-color: var(--bike-color); }
.goal-card.run-goal { border-left-color: var(--run-color); }

.goal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.goal-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 15px;
}

.goal-value {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 600;
}

.goal-progress {
    background: #E8ECEF;
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
}

.goal-progress-bar {
    height: 100%;
    border-radius: 5px;
    transition: width 0.6s ease;
}

.goal-progress-bar.swim {
    background: var(--gradient-swim);
}

.goal-progress-bar.bike {
    background: var(--gradient-bike);
}

.goal-progress-bar.run {
    background: var(--gradient-run);
}

.goal-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-light);
    font-weight: 500;
}

.set-goals-form {
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 2px dashed var(--border);
}

.set-goals-form h3 {
    font-size: 16px;
    margin-bottom: 16px;
    font-weight: 700;
}

/* ========== 统计页面 ========== */
.stats-period {
    margin-bottom: 20px;
}

.stats-period select {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--card);
    font-weight: 600;
    transition: border-color 0.3s;
}

.stats-period select:focus {
    outline: none;
    border-color: var(--primary);
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

@media (min-width: 480px) {
    .stats-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 18px 14px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: all 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card.swim {
    border-top: 3px solid var(--swim-color);
}
.stat-card.swim::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50px;
    height: 50px;
    background: radial-gradient(circle, rgba(41,121,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.stat-card.bike {
    border-top: 3px solid var(--bike-color);
}

.stat-card.run {
    border-top: 3px solid var(--run-color);
}

.stat-card.other {
    border-top: 3px solid var(--other-color);
}

.stat-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.stat-distance {
    font-size: 22px;
    font-weight: 800;
    color: var(--text);
}

.stat-unit {
    font-size: 12px;
    color: var(--text-light);
    font-weight: 600;
}

.stat-duration {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.stats-history h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-light);
    font-weight: 700;
}

/* ========== 动态页面 ========== */
.feed-filter {
    margin-bottom: 16px;
}

.feed-filter select {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--card);
    font-weight: 600;
}

.feed-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feed-item {
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.feed-item:hover {
    box-shadow: var(--shadow-md);
}

.feed-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.feed-user {
    font-weight: 700;
    font-size: 15px;
}

.feed-time {
    font-size: 12px;
    color: var(--text-light);
}

.feed-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feed-sport {
    font-size: 36px;
}

.feed-details {
    flex: 1;
}

.feed-distance {
    font-size: 18px;
    font-weight: 700;
}

.feed-duration {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 2px;
}

/* ========== 排行榜页面 ========== */
.rank-period-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.rank-period-btn {
    flex: 1;
    padding: 10px 6px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--card);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.rank-period-btn.active {
    background: var(--gradient-sport);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.rank-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.rank-tab {
    flex-shrink: 0;
    padding: 8px 16px;
    border: 2px solid var(--border);
    border-radius: 20px;
    background: var(--card);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.rank-tab.active {
    background: var(--gradient-sport);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.rank-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rank-item {
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.rank-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}

.rank-item.highlight {
    background: linear-gradient(135deg, var(--primary-light), #F0FFF4);
    border: 2px solid rgba(0,191,166,0.3);
}

.rank-position {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 14px;
    background: #E8ECEF;
    color: var(--text-light);
    flex-shrink: 0;
}

.rank-item:nth-child(1) .rank-position {
    background: linear-gradient(135deg, #FFD700, #FFA000);
    color: white;
    box-shadow: 0 2px 8px rgba(255,215,0,0.4);
}

.rank-item:nth-child(2) .rank-position {
    background: linear-gradient(135deg, #CFD8DC, #90A4AE);
    color: white;
    box-shadow: 0 2px 8px rgba(144,164,174,0.4);
}

.rank-item:nth-child(3) .rank-position {
    background: linear-gradient(135deg, #CD7F32, #A1887F);
    color: white;
    box-shadow: 0 2px 8px rgba(205,127,50,0.4);
}

.rank-user {
    flex: 1;
    font-weight: 600;
}

.rank-value {
    font-weight: 800;
    font-size: 17px;
    background: var(--gradient-sport);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rank-unit {
    font-size: 12px;
    color: var(--text-light);
    margin-left: 2px;
    -webkit-text-fill-color: var(--text-light);
}

/* ========== Toast提示 ========== */
.toast {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(26,35,50,0.9);
    color: white;
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    backdrop-filter: blur(10px);
}

.toast.show {
    opacity: 1;
}

.toast.success {
    background: var(--primary);
}

.toast.error {
    background: var(--danger);
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-light);
}

.empty-icon {
    font-size: 52px;
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-text {
    font-size: 15px;
    font-weight: 500;
}

/* ========== 响应式 ========== */
@media (min-width: 768px) {
    #auth-page {
        padding: 40px;
    }

    .auth-container {
        padding: 44px 40px;
    }

    .content {
        max-width: 640px;
        margin: 0 auto;
    }

    .stats-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .modal-overlay {
        align-items: center;
        padding: 20px;
    }

    .modal-box {
        border-radius: var(--radius-lg);
        max-width: 480px;
    }

    @keyframes modalSlideUp {
        from { transform: translateY(20px); opacity: 0; }
        to   { transform: translateY(0);    opacity: 1; }
    }
}

/* 移动端通用touch优化 */
@media (max-width: 767px) {
    button, a, input, select {
        -webkit-tap-highlight-color: transparent;
    }

    .btn-primary, .period-btn, .rank-period-btn, .rank-tab {
        min-height: 44px;
        touch-action: manipulation;
    }

    .nav-tab {
        min-height: 50px;
        touch-action: manipulation;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px;
    }

    .header {
        padding: 10px 14px;
    }

    .toast {
        bottom: calc(90px + env(safe-area-inset-bottom));
    }

    .content {
        padding: 12px;
    }
}

/* ========== 训练计划页面 ========== */
.plan-header-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.day-nav-btn {
    width: 38px;
    height: 38px;
    border: 2px solid var(--border);
    border-radius: 50%;
    background: var(--card);
    font-size: 22px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-weight: 700;
}

.day-nav-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.plan-date-label {
    flex: 1;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
}

.btn-add-plan {
    background: var(--gradient-sport);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 22px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.btn-add-plan:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.plans-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan-item {
    background: var(--card);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: var(--shadow-sm);
    position: relative;
    border-left: 4px solid var(--primary);
    transition: all 0.2s;
}

.plan-item:hover {
    box-shadow: var(--shadow-md);
}

.plan-item[data-sport="swim"] { border-left-color: var(--swim-color); }
.plan-item[data-sport="bike"] { border-left-color: var(--bike-color); }
.plan-item[data-sport="run"] { border-left-color: var(--run-color); }
.plan-item[data-sport="other"] { border-left-color: var(--other-color); }

.plan-item.completed {
    opacity: 0.7;
    background: var(--primary-light);
}

.plan-item .plan-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    justify-content: flex-start;
    border-bottom: none;
}

.plan-sport-icon {
    font-size: 26px;
}

.plan-title {
    flex: 1;
    font-weight: 700;
    font-size: 15px;
}

.plan-status {
    font-size: 12px;
    color: var(--text-light);
    margin-right: 48px;
    font-weight: 500;
}

.plan-body {
    font-size: 14px;
    color: var(--text-light);
}

.plan-detail {
    margin-bottom: 4px;
}

.plan-note {
    font-size: 13px;
    color: #888;
    margin-top: 4px;
    font-style: italic;
}

.plan-progress-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
}

.plan-progress {
    flex: 1;
    height: 6px;
    background: #E8ECEF;
    border-radius: 3px;
    overflow: hidden;
}

.plan-progress-bar {
    height: 100%;
    background: var(--gradient-sport);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.plan-progress-text {
    font-size: 12px;
    white-space: nowrap;
    font-weight: 600;
}

.plan-actions {
    position: absolute;
    top: 14px;
    right: 12px;
    display: flex;
    gap: 2px;
}

.btn-icon {
    width: 30px;
    height: 30px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    opacity: 0.4;
    transition: all 0.2s;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    opacity: 1;
    background: var(--bg);
}

/* ========== Modal 弹窗 ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    backdrop-filter: blur(4px);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    width: 100%;
    max-width: 500px;
    max-height: 92vh;
    background: var(--card);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    overflow: hidden;
    animation: modalSlideUp 0.3s ease-out;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -4px 30px rgba(0,0,0,0.2);
}

@keyframes modalSlideUp {
    from { transform: translateY(100%); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
    font-weight: 700;
    font-size: 17px;
}

.modal-close {
    width: 34px;
    height: 34px;
    border: none;
    background: var(--bg);
    font-size: 18px;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--border);
}

.modal-body {
    padding: 22px;
    max-height: calc(92vh - 60px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* ========== 排行榜表格样式 ========== */
.rank-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.rank-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    font-size: 13px;
    min-width: 340px;
}

.rank-table thead tr {
    background: var(--gradient-sport);
    color: #fff;
}

.rank-table th {
    padding: 12px 10px;
    text-align: center;
    font-weight: 700;
    white-space: nowrap;
    font-size: 12px;
}

.rank-table tbody tr {
    border-bottom: 1px solid #F0F4F8;
    transition: background 0.15s;
}

.rank-table tbody tr:nth-child(even) {
    background: #FAFBFC;
}

.rank-table tbody tr:hover {
    background: var(--primary-light);
}

.rank-table tbody tr.rank-me {
    background: var(--primary-light);
    border-left: 3px solid var(--primary);
}

.rank-table td {
    padding: 10px 8px;
    text-align: center;
    vertical-align: middle;
    color: var(--text);
}

.rank-table td.rank-pos {
    font-weight: 800;
    color: var(--text-light);
}

.rank-table tbody tr:nth-child(1) td.rank-pos { color: #FFA000; }
.rank-table tbody tr:nth-child(2) td.rank-pos { color: #90A4AE; }
.rank-table tbody tr:nth-child(3) td.rank-pos { color: #A1887F; }

.rank-table td.rank-name {
    font-weight: 700;
    text-align: left;
    white-space: nowrap;
    color: var(--primary-dark);
}

.rank-table td.rank-val {
    font-weight: 800;
    color: var(--secondary);
}