/* ============================================
   表白墙 - 前台样式（粉色主题）
   ============================================ */

/* === 基础变量 === */
:root {
    --pink-50: #FFF0F5;
    --pink-100: #FFE4EC;
    --pink-200: #FCE4EC;
    --pink-300: #F8BBD0;
    --pink-400: #F48FB1;
    --pink-500: #FF6B9D;
    --pink-600: #E91E63;
    --pink-700: #D81B60;
    --pink-800: #C2185B;
    --pink-900: #AD1457;
    --white: #ffffff;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-500: #9E9E9E;
    --gray-700: #616161;
    --gray-900: #212121;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(255, 107, 157, 0.15);
    --shadow-xl: 0 30px 80px rgba(255, 107, 157, 0.2);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #FCE4EC 0%, #FFF0F5 30%, #FFE4EC 60%, #FFF5F7 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--gray-900);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === 浮动爱心背景 === */
.hearts-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.heart-float {
    position: absolute;
    color: var(--pink-500);
    opacity: 0.15;
    animation: floatUp 12s linear infinite;
    font-size: 24px;
}
@keyframes floatUp {
    0% { transform: translateY(110vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.2; }
    90% { opacity: 0.2; }
    100% { transform: translateY(-10vh) rotate(360deg); opacity: 0; }
}

/* === 主容器 === */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* === 导航栏 === */
.navbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 107, 157, 0.15);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0 20px;
    transition: var(--transition);
}
.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--pink-700);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.nav-brand .logo-icon {
    width: 38px; height: 38px;
    background: linear-gradient(135deg, var(--pink-500), var(--pink-700));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(255, 107, 157, 0.3);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.nav-btn {
    padding: 8px 20px;
    border-radius: 25px;
    border: 2px solid var(--pink-500);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-btn-outline {
    background: transparent;
    color: var(--pink-600);
}
.nav-btn-outline:hover {
    background: var(--pink-500);
    color: white;
}
.nav-btn-primary {
    background: linear-gradient(135deg, var(--pink-500), var(--pink-700));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(255, 107, 157, 0.3);
}
.nav-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 157, 0.4);
}
.nav-user {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 6px 16px 6px 6px;
    border-radius: 25px;
    background: var(--pink-50);
    transition: var(--transition);
}
.nav-user:hover { background: var(--pink-100); }
.nav-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--pink-400), var(--pink-600));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    font-weight: bold;
}
.nav-username {
    font-size: 14px;
    font-weight: 600;
    color: var(--pink-700);
}

/* === 头图区域 === */
.hero {
    text-align: center;
    padding: 60px 20px 40px;
    position: relative;
}
.hero h1 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 900;
    background: linear-gradient(135deg, var(--pink-500), var(--pink-800));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    letter-spacing: -1px;
}
.hero .subtitle {
    font-size: 18px;
    color: var(--gray-500);
    margin-bottom: 30px;
}
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 20px;
}
.stat-item {
    text-align: center;
}
.stat-num {
    font-size: 28px;
    font-weight: 800;
    color: var(--pink-600);
}
.stat-label {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 2px;
}

/* === 发布区 === */
.publish-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--pink-100);
    transition: var(--transition);
}
.publish-card h3 {
    font-size: 20px;
    color: var(--pink-700);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.form-input, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--gray-50);
}
.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--pink-500);
    background: white;
    box-shadow: 0 0 0 4px rgba(255, 107, 157, 0.1);
}
.form-textarea {
    min-height: 120px;
    resize: vertical;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}
.form-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-700);
    cursor: pointer;
}
.form-toggle input { display: none; }
.toggle-switch {
    width: 44px; height: 24px;
    background: var(--gray-300);
    border-radius: 12px;
    position: relative;
    transition: var(--transition);
}
.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px; left: 2px;
    width: 20px; height: 20px;
    background: white;
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.form-toggle input:checked + .toggle-switch {
    background: var(--pink-500);
}
.form-toggle input:checked + .toggle-switch::after {
    left: 22px;
}
.btn-submit {
    padding: 12px 36px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    background: linear-gradient(135deg, var(--pink-500), var(--pink-700));
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 157, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
}
.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 107, 157, 0.4);
}
.btn-submit:active { transform: scale(0.97); }
.char-count {
    font-size: 12px;
    color: var(--gray-500);
}

/* === 工具栏 === */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--pink-100);
}
.toolbar-tabs {
    display: flex;
    gap: 4px;
    background: var(--gray-100);
    border-radius: 25px;
    padding: 4px;
}
.toolbar-tab {
    padding: 8px 20px;
    border-radius: 25px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
}
.toolbar-tab.active {
    background: white;
    color: var(--pink-600);
    box-shadow: var(--shadow-sm);
}
.toolbar-search {
    display: flex;
    align-items: center;
    gap: 8px;
}
.toolbar-search input {
    padding: 8px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 25px;
    font-size: 14px;
    width: 200px;
    transition: var(--transition);
}
.toolbar-search input:focus {
    outline: none;
    border-color: var(--pink-500);
    width: 250px;
}
.btn-search {
    width: 38px; height: 38px;
    border-radius: 50%;
    border: none;
    background: var(--pink-500);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.btn-search:hover { background: var(--pink-700); }

/* === 表白卡片瀑布流 === */
.confessions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}
.confession-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    overflow: hidden;
}
.confession-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--pink-200);
}
.confession-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    border-radius: 4px 4px 0 0;
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}
.card-user {
    display: flex;
    align-items: center;
    gap: 10px;
}
.card-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    font-weight: bold;
}
.card-nickname {
    font-weight: 700;
    font-size: 15px;
}
.card-badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 12px;
    font-weight: 600;
}
.card-badge-anonymous {
    background: var(--pink-100);
    color: var(--pink-600);
}
.card-to {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 12px;
}
.card-to .heart-icon { color: var(--pink-500); }
.card-content {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 16px;
    word-break: break-word;
}
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
}
.card-actions {
    display: flex;
    gap: 16px;
}
.card-action {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--gray-500);
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 20px;
    transition: var(--transition);
}
.card-action:hover {
    background: var(--pink-50);
    color: var(--pink-600);
}
.card-action.liked {
    color: var(--pink-600);
    background: var(--pink-50);
}
.card-action.liked .heart-icon {
    animation: heartBeat 0.3s ease;
}
@keyframes heartBeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}
.card-time {
    font-size: 12px;
    color: var(--gray-500);
}

/* === 分页 === */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin: 30px 0 60px;
}
.page-btn {
    width: 40px; height: 40px;
    border-radius: 50%;
    border: 2px solid var(--pink-200);
    background: white;
    color: var(--pink-600);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.page-btn:hover { background: var(--pink-50); border-color: var(--pink-500); }
.page-btn.active {
    background: linear-gradient(135deg, var(--pink-500), var(--pink-700));
    color: white;
    border-color: transparent;
}
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* === 模态框 === */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideUp {
    from { transform: translateY(40px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.modal {
    background: white;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-xl);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    border-bottom: 1px solid var(--gray-100);
    position: sticky;
    top: 0;
    background: white;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    z-index: 1;
}
.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--pink-700);
}
.modal-close {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--gray-100);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--gray-200); }
.modal-body {
    padding: 24px 28px;
}
.modal-footer {
    padding: 16px 28px;
    border-top: 1px solid var(--gray-100);
}

/* === 登录模态框 === */
.login-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    background: var(--gray-100);
    border-radius: 25px;
    padding: 4px;
}
.login-tab {
    flex: 1;
    padding: 10px;
    border-radius: 25px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray-700);
}
.login-tab.active {
    background: white;
    color: var(--pink-600);
    box-shadow: var(--shadow-sm);
}
.login-error {
    background: #FFF0F0;
    color: #D32F2F;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    margin-bottom: 16px;
    display: none;
}
.register-hint {
    text-align: center;
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 16px;
    padding: 12px;
    background: var(--pink-50);
    border-radius: var(--radius-md);
}
.register-hint a {
    color: var(--pink-600);
    font-weight: 700;
    text-decoration: none;
}
.register-hint a:hover { text-decoration: underline; }

/* === 详情模态框 === */
.detail-card {
    margin-bottom: 24px;
}
.detail-to {
    font-size: 18px;
    font-weight: 700;
    color: var(--pink-600);
    margin-bottom: 12px;
}
.detail-content {
    font-size: 16px;
    line-height: 1.9;
    color: var(--gray-900);
}
.comments-section h4 {
    font-size: 16px;
    color: var(--gray-700);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.comment-item {
    display: flex;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-100);
}
.comment-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    color: white;
}
.comment-body {
    flex: 1;
}
.comment-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}
.comment-nickname {
    font-weight: 700;
    font-size: 14px;
}
.comment-time {
    font-size: 12px;
    color: var(--gray-500);
}
.comment-text {
    font-size: 14px;
    color: var(--gray-700);
}
.comment-form {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}
.comment-form input {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 25px;
    font-size: 14px;
    transition: var(--transition);
}
.comment-form input:focus {
    outline: none;
    border-color: var(--pink-500);
}

/* === Toast 提示 === */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    padding: 14px 28px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.3s ease;
    white-space: nowrap;
}
.toast-success { background: #E8F5E9; color: #2E7D32; }
.toast-error { background: #FFEBEE; color: #C62828; }
@keyframes slideDown {
    from { transform: translateX(-50%) translateY(-100%); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* === Loading === */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}
.loading-spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--pink-100);
    border-top-color: var(--pink-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* === 空状态 === */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}
.empty-state .empty-icon {
    font-size: 64px;
    display: block;
    margin-bottom: 16px;
}
.empty-state p {
    font-size: 16px;
}

/* === 响应式 === */
@media (max-width: 768px) {
    .confessions-grid {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .hero-stats {
        gap: 24px;
    }
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    .toolbar-search input {
        width: 100%;
    }
    .toolbar-search input:focus {
        width: 100%;
    }
    .navbar-inner {
        height: 56px;
    }
    .nav-brand {
        font-size: 18px;
    }
}

/* === 页脚 === */
.footer {
    text-align: center;
    padding: 30px;
    color: var(--gray-500);
    font-size: 13px;
    position: relative;
    z-index: 1;
}
.footer a {
    color: var(--pink-600);
    text-decoration: none;
}
.footer a:hover { text-decoration: underline; }