/**
 * 自定义样式
 * 从 layout/main.php 中提取
 * 完全参考 landing-v3.html 设计
 */

/* ===== 设计变量 ===== */
:root {
    /* 核心调色板 - 珊瑚色 + 蓝绿色 */
    --coral: #FF6B4A;
    --coral-light: #FF8A6B;
    --coral-dark: #E5523A;
    --teal: #2EC4B6;
    --teal-light: #3EDDD0;
    --sunny: #FFD166;
    --purple: #9B5DE5;
    --pink: #F15BB5;
    
    /* 中性色（带温暖） */
    --gray-50: #FEF9F5;
    --gray-100: #FDF2EB;
    --gray-200: #F5E6D8;
    --gray-300: #E8D5C4;
    --gray-400: #C4B0A0;
    --gray-500: #8A7A6B;
    --gray-600: #5C5045;
    --gray-700: #3D3430;
    --gray-800: #2A2320;
    --gray-900: #1A1512;
    
    /* 语义化颜色 */
    --text: var(--gray-800);
    --text-light: var(--gray-500);
    --bg: #FFFFFF;
    --bg-alt: var(--gray-50);
    --border: var(--gray-200);
    
    /* 渐变 */
    --gradient-warm: linear-gradient(135deg, var(--coral), var(--coral-light));
    --gradient-cool: linear-gradient(135deg, var(--teal), var(--teal-light));
    --gradient-sunny: linear-gradient(135deg, var(--sunny), var(--coral));
    
    /* 字体 */
    --font-display: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, sans-serif;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.16);
    --shadow-coral: 0 8px 24px rgba(255,107,74,0.3);
    --shadow-teal: 0 8px 24px rgba(46,196,182,0.3);
}

/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--coral);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--coral-dark);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar .logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--coral);
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar .nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.navbar .nav a {
    color: var(--text);
    font-weight: 500;
    transition: color 0.2s;
}

.navbar .nav a:hover {
    color: var(--coral);
}

.navbar .nav .btn {
    padding: 10px 24px;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all 0.3s;
}

.navbar .nav .btn-primary {
    background: var(--coral);
    color: white;
}

.navbar .nav .btn-primary:hover {
    background: var(--coral-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-coral);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 80px 0 40px;
}

.footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer .grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer .logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--coral);
    margin-bottom: 16px;
}

.footer .description {
    color: var(--gray-500);
    margin-bottom: 24px;
    line-height: 1.8;
}

.footer .social {
    display: flex;
    gap: 12px;
}

.footer .social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-800);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-300);
    transition: all 0.3s;
}

.footer .social a:hover {
    background: var(--coral);
    color: white;
    transform: translateY(-4px);
}

.footer h4 {
    color: white;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 12px;
}

.footer ul a {
    color: var(--gray-500);
    transition: color 0.2s;
}

.footer ul a:hover {
    color: var(--coral);
}

.footer .bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--gray-600);
    font-size: 0.9rem;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--coral);
    color: white;
}

.btn-primary:hover {
    background: var(--coral-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-coral);
}

.btn-secondary {
    background: var(--teal);
    color: white;
}

.btn-secondary:hover {
    background: var(--teal-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-teal);
}

/* ===== 卡片 ===== */
.card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all 0.4s;
}

.card:hover {
    border-color: var(--coral);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.3s;
    background: var(--bg);
    color: var(--text);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--coral);
    box-shadow: 0 0 0 4px rgba(255,107,74,0.1);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .navbar .nav {
        display: none;
    }
    
    .footer .grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .container {
        padding: 0 16px;
    }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

.pt-1 { padding-top: 8px; }
.pt-2 { padding-top: 16px; }
.pt-3 { padding-top: 24px; }
.pt-4 { padding-top: 32px; }
.pt-5 { padding-top: 48px; }

.pb-1 { padding-bottom: 8px; }
.pb-2 { padding-bottom: 16px; }
.pb-3 { padding-bottom: 24px; }
.pb-4 { padding-bottom: 32px; }
.pb-5 { padding-bottom: 48px; }

/* ===== 认证页面样式 ===== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 60px;
    background: var(--gray-100);
}

[data-theme="dark"] .auth-container {
    background: var(--gray-900);
}

.auth-card {
    background: white;
    border-radius: 24px;
    padding: 48px;
    max-width: 440px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    border: 2px solid var(--gray-200);
    animation: fadeInUp 0.6s ease-out;
}

[data-theme="dark"] .auth-card {
    background: var(--gray-800);
    border-color: var(--gray-700);
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.auth-header p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    display: block;
    margin-bottom: 8px;
}

.form-input {
    padding: 14px 18px;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
    transition: all 0.3s;
    width: 100%;
}

.form-input:focus {
    outline: none;
    border-color: var(--coral);
    box-shadow: 0 0 0 4px rgba(255, 107, 74, 0.1);
}

[data-theme="dark"] .form-input {
    background: var(--gray-900);
    border-color: var(--gray-700);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--coral);
}

.form-link {
    color: var(--coral);
    text-decoration: none;
    font-weight: 500;
}

.form-link:hover {
    text-decoration: underline;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

[data-theme="dark"] .auth-divider::before,
[data-theme="dark"] .auth-divider::after {
    background: var(--gray-700);
}

.auth-social {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 14px;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.auth-social-btn:hover {
    border-color: var(--coral);
    background: var(--gray-100);
}

[data-theme="dark"] .auth-social-btn {
    background: var(--gray-900);
    border-color: var(--gray-700);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--coral);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.auth-button {
    padding: 16px;
    background: var(--coral);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--font-display);
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    margin-top: 8px;
}

.auth-button:hover {
    background: #ff5542;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 107, 74, 0.3);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.password-strength {
    margin-top: 8px;
    display: flex;
    gap: 8px;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--gray-200);
    border-radius: 2px;
    transition: all 0.3s;
}

.strength-bar.weak {
    background: #ef4444;
}

.strength-bar.medium {
    background: #f59e0b;
}

.strength-bar.strong {
    background: var(--teal);
}

.strength-text {
    font-size: 0.85rem;
    margin-top: 4px;
    color: var(--text-secondary);
}

.alert {
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-error {
    background: rgba(255, 107, 74, 0.1);
    color: var(--coral);
    border: 2px solid rgba(255, 107, 74, 0.3);
}

.alert-success {
    background: rgba(46, 196, 182, 0.1);
    color: var(--teal);
    border: 2px solid rgba(46, 196, 182, 0.3);
}

/* ===== 响应式设计（认证页面）===== */
@media (max-width: 768px) {
    .auth-card {
        padding: 32px 24px;
    }

    .auth-header h1 {
        font-size: 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}