/* ============================================================
   一点光 · 设备配置网站 — 样式
   暖色调设计，匹配项目主题
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --color-bg: #FFF8F0;
    --color-surface: #FFFFFF;
    --color-surface-warm: #FFF4E6;
    --color-primary: #FF8C42;
    --color-primary-hover: #F47B30;
    --color-primary-light: #FFE0CC;
    --color-secondary: #FFD66B;
    --color-danger: #E84855;
    --color-danger-hover: #D63A47;
    --color-success: #7FB069;
    --color-text: #3D2817;
    --color-text-secondary: #8B7355;
    --color-text-muted: #B5A488;
    --color-border: #F0E0D0;
    --color-border-focus: #FF8C42;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(139, 115, 85, 0.1);
    --shadow-md: 0 4px 12px rgba(139, 115, 85, 0.12);
    --shadow-lg: 0 8px 32px rgba(139, 115, 85, 0.15);
    --transition: 0.2s ease;
    --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

.hidden { display: none !important; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-warm);
    color: var(--color-text);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

/* ---------- 表单元素 ---------- */
input, select, textarea {
    font-family: var(--font);
    font-size: 14px;
    padding: 10px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(255, 140, 66, 0.15);
}

input::placeholder {
    color: var(--color-text-muted);
}

select {
    cursor: pointer;
    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='%238B7355' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

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

.form-field label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.form-field .required {
    color: var(--color-danger);
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.form-row {
    display: flex;
    gap: 16px;
}

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

/* ---------- 登录/注册页面 ---------- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #FFF8F0 0%, #FFE8D6 100%);
}

.auth-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.auth-logo {
    text-align: center;
    margin-bottom: 12px;
}

.auth-logo svg {
    filter: drop-shadow(0 2px 12px rgba(255, 140, 66, 0.25));
}

.auth-title {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
}

.auth-subtitle {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

.auth-tabs {
    display: flex;
    gap: 4px;
    background: var(--color-surface-warm);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 24px;
}

.auth-tab {
    flex: 1;
    padding: 8px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.auth-tab.active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.auth-error {
    margin-top: 16px;
    padding: 10px 14px;
    background: #FFF0F0;
    border: 1px solid #FFD0D0;
    border-radius: var(--radius-sm);
    color: var(--color-danger);
    font-size: 13px;
}

/* ---------- 主界面 ---------- */
.app-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-logo {
    display: flex;
    align-items: center;
    line-height: 0;
}

.header-logo svg {
    filter: drop-shadow(0 1px 4px rgba(255, 140, 66, 0.2));
}

.header-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-email {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.app-main {
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px;
    flex: 1;
}

/* ---------- Tab 导航 ---------- */
.tab-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-border);
}

.tab-nav-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border: none;
    background: transparent;
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

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

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

/* ---------- 面板 ---------- */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.panel-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

.section-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

/* ---------- 设备卡片网格 ---------- */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.device-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1.5px solid transparent;
    transition: all var(--transition);
    cursor: pointer;
}

.device-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.device-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.device-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
}

.device-card-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.device-card-code {
    font-size: 12px;
    color: var(--color-text-muted);
    font-family: monospace;
}

.device-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: var(--color-surface-warm);
    border-radius: 20px;
    font-size: 12px;
    color: var(--color-text-secondary);
}

.meta-tag svg {
    flex-shrink: 0;
}

.device-card-actions {
    margin-top: 14px;
    display: flex;
    gap: 8px;
}

/* ---------- 空状态 ---------- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 13px;
}

/* ---------- 加载 ---------- */
.loading-spinner {
    text-align: center;
    padding: 40px;
    color: var(--color-text-muted);
    font-size: 14px;
    grid-column: 1 / -1;
}

/* ---------- 通信关系 ---------- */
.connection-builder {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.connection-form {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.connection-form select {
    flex: 1;
    min-width: 140px;
}

.connection-arrow {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.connection-list-section {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

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

.connection-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--color-surface-warm);
    border-radius: var(--radius-sm);
}

.connection-device {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.connection-device-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
}

.connection-device-name {
    font-size: 14px;
    font-weight: 500;
}

.connection-device-code {
    font-size: 11px;
    color: var(--color-text-muted);
    font-family: monospace;
}

.connection-link-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ---------- 弹窗 ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(61, 40, 23, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 1000;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 520px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    border: none;
    background: transparent;
    font-size: 24px;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color var(--transition);
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--color-border);
}

/* ---------- Toast ---------- */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 2000;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    color: #fff;
    box-shadow: var(--shadow-md);
    animation: toastSlide 0.3s ease;
    max-width: 360px;
}

.toast.success { background: var(--color-success); }
.toast.error { background: var(--color-danger); }
.toast.info { background: var(--color-primary); }

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

/* ---------- 链接 ---------- */
.link-hint {
    color: var(--color-primary);
    text-decoration: none;
}

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

/* ---------- 着陆页 ---------- */
.landing-page {
    min-height: 100vh;
}

.landing-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Hero */
.landing-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(ellipse at center top, #1a1f2e 0%, #0a0f1a 100%);
    position: relative;
    overflow: hidden;
}

.landing-hero::before {
    content: '';
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 140, 66, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.landing-hero-content {
    position: relative;
    z-index: 1;
    padding: 24px;
}

.landing-hero-logo svg {
    filter: drop-shadow(0 4px 24px rgba(255, 140, 66, 0.3));
    animation: heroGlow 4s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    from { filter: drop-shadow(0 4px 24px rgba(255, 140, 66, 0.25)); }
    to { filter: drop-shadow(0 4px 36px rgba(255, 214, 107, 0.4)); }
}

.landing-hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #FF8C42;
    margin-top: 16px;
    letter-spacing: 2px;
}

.landing-hero-tagline {
    font-size: 18px;
    color: #FFD66B;
    margin-top: 4px;
    letter-spacing: 1px;
}

.landing-hero-desc {
    font-size: 16px;
    color: rgba(255, 248, 240, 0.7);
    margin-top: 24px;
    line-height: 2;
}

.landing-cta-btn {
    margin-top: 32px;
    padding: 14px 36px;
    font-size: 16px;
    border-radius: 12px;
}

.landing-hero-login-hint {
    margin-top: 20px;
    font-size: 13px;
    color: rgba(255, 248, 240, 0.4);
}

.landing-hero-login-link {
    color: rgba(255, 214, 107, 0.7);
    text-decoration: none;
    transition: color 0.2s;
}

.landing-hero-login-link:hover {
    color: #FFD66B;
}

.landing-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 248, 240, 0.3);
    cursor: pointer;
    animation: scrollBounce 2s ease-in-out infinite;
    transition: color 0.2s;
}

.landing-scroll-indicator:hover {
    color: rgba(255, 248, 240, 0.6);
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* 通用 section */
.landing-section {
    padding: 80px 0;
}

.landing-section-title {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 48px;
}

/* 故事 */
.landing-story {
    background: var(--color-surface-warm);
    text-align: center;
}

.landing-story-quote {
    font-size: 22px;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 28px;
    position: relative;
    padding: 0 20px;
}

.landing-story-text {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 2.2;
}

.landing-story-highlight {
    display: inline-block;
    margin-top: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
}

/* 功能卡片 */
.landing-features {
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1.5px solid transparent;
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.feature-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 三步上手 */
.landing-steps {
    background: var(--color-surface);
}

.steps-grid {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 12px;
}

.step-card {
    flex: 1;
    max-width: 240px;
    background: var(--color-surface-warm);
    border-radius: var(--radius-lg);
    padding: 32px 20px;
    text-align: center;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.step-card p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.step-arrow {
    display: flex;
    align-items: center;
    color: var(--color-primary);
    opacity: 0.5;
}

/* 不一样 */
.landing-different {
    background: var(--color-bg);
}

.different-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 640px;
    margin: 0 auto;
}

.different-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
}

.different-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.different-icon-no {
    background: #FFF0F0;
    color: var(--color-danger);
}

.different-icon-yes {
    background: #E8F5E0;
    color: var(--color-success);
}

.different-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.different-text strong {
    font-size: 15px;
    color: var(--color-text);
}

.different-text span {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* 收尾 CTA */
.landing-cta {
    background: radial-gradient(ellipse at center, #1a1f2e 0%, #0a0f1a 100%);
    text-align: center;
    padding: 100px 24px;
}

.landing-cta-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.landing-cta-quote {
    font-size: 32px;
    font-weight: 700;
    color: #FFD66B;
    line-height: 1.6;
    margin-bottom: 32px;
}

.landing-cta-hint {
    margin-top: 16px;
    font-size: 13px;
    color: rgba(255, 248, 240, 0.4);
}

/* 着陆页响应式 */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        flex-direction: column;
        align-items: center;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .step-card {
        width: 100%;
        max-width: 320px;
    }

    .different-grid {
        grid-template-columns: 1fr;
    }

    .landing-hero-title {
        font-size: 36px;
    }

    .landing-story-quote {
        font-size: 18px;
    }

    .landing-cta-quote {
        font-size: 24px;
    }

    .landing-section {
        padding: 56px 0;
    }

    .landing-section-title {
        font-size: 22px;
        margin-bottom: 32px;
    }
}

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .connection-form {
        flex-direction: column;
        align-items: stretch;
    }

    .connection-arrow {
        transform: rotate(90deg);
        align-self: center;
    }

    .header-right .user-email {
        display: none;
    }

    .app-main {
        padding: 16px 12px;
    }

    .device-grid {
        grid-template-columns: 1fr;
    }
}