/* ================================================================
   墨记 — 待办事项系统
   五套主题 · 通过 data-theme 属性切换
   ================================================================ */

/* ── 通用令牌（不随主题变） ── */
:root {
    --font-display: 'Noto Serif SC', 'Songti SC', serif;
    --font-body: 'Noto Serif SC', 'Songti SC', serif;
    --font-fun: 'ZCOOL KuaiLe', cursive;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 40px;
    --space-2xl: 64px;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── 主题 1: 墨纸禅（默认） ── */
[data-theme="ink"], :root {
    --ink-deepest: #0d0d10;
    --ink-deep: #141418;
    --ink-dark: #1c1c22;
    --ink-medium: #27272d;
    --ink-light: #38383f;
    --ink-faint: #4e4e5a;
    --paper: #e8e0d4;
    --paper-warm: #d4cbbe;
    --paper-dim: #9e9688;
    --vermillion: #c23b22;
    --vermillion-glow: #e04a2f;
    --vermillion-deep: #8b1a0e;
    --vermillion-bg: rgba(194, 59, 34, 0.08);
    --jade: #4a8c6f;
    --jade-dim: #3a6c55;
    --success: #4a8c6f;
    --warning: #c49a2a;
    --danger: #c23b22;
    --bg-texture1: rgba(194, 59, 34, 0.03);
    --bg-texture2: rgba(74, 140, 111, 0.02);
    --noise-opacity: 0.035;
    --scrollbar-track: #0d0d10;
}

/* ── 主题 2: 春日笺（浅色多彩） ── */
[data-theme="spring"] {
    --ink-deepest: #faf7f2;
    --ink-deep: #f5f0e8;
    --ink-dark: #ede7db;
    --ink-medium: #e0d8ca;
    --ink-light: #cfc5b3;
    --ink-faint: #a89e8e;
    --paper: #3a3228;
    --paper-warm: #4a4038;
    --paper-dim: #7a6f63;
    --vermillion: #d4577a;
    --vermillion-glow: #e8699a;
    --vermillion-deep: #a33d5c;
    --vermillion-bg: rgba(212, 87, 122, 0.1);
    --jade: #3b9a6e;
    --jade-dim: #2d7a55;
    --success: #3b9a6e;
    --warning: #d4a030;
    --danger: #d4577a;
    --bg-texture1: rgba(212, 87, 122, 0.04);
    --bg-texture2: rgba(100, 80, 200, 0.03);
    --noise-opacity: 0.02;
    --scrollbar-track: #f5f0e8;
}

/* ── 主题 3: 赛博霓虹 ── */
[data-theme="cyber"] {
    --ink-deepest: #05050a;
    --ink-deep: #0a0a14;
    --ink-dark: #0f0f1e;
    --ink-medium: #161628;
    --ink-light: #222240;
    --ink-faint: #3a3a66;
    --paper: #e0f0ff;
    --paper-warm: #b8d4ee;
    --paper-dim: #6688aa;
    --vermillion: #00e5ff;
    --vermillion-glow: #40f0ff;
    --vermillion-deep: #0099aa;
    --vermillion-bg: rgba(0, 229, 255, 0.08);
    --jade: #ff2d8a;
    --jade-dim: #cc1a6a;
    --success: #00e5a0;
    --warning: #ffe040;
    --danger: #ff2d55;
    --bg-texture1: rgba(0, 229, 255, 0.04);
    --bg-texture2: rgba(255, 45, 138, 0.03);
    --noise-opacity: 0.05;
    --scrollbar-track: #05050a;
}

/* ── 主题 4: 山林雾 ── */
[data-theme="forest"] {
    --ink-deepest: #0a100d;
    --ink-deep: #0f1a13;
    --ink-dark: #15221a;
    --ink-medium: #1e2e24;
    --ink-light: #2d4035;
    --ink-faint: #456650;
    --paper: #d8e4d0;
    --paper-warm: #c2d4b4;
    --paper-dim: #8aaa78;
    --vermillion: #c8963a;
    --vermillion-glow: #e0aa44;
    --vermillion-deep: #8a6620;
    --vermillion-bg: rgba(200, 150, 58, 0.1);
    --jade: #5aaa6e;
    --jade-dim: #448a55;
    --success: #5aaa6e;
    --warning: #c8963a;
    --danger: #cc5544;
    --bg-texture1: rgba(90, 170, 110, 0.04);
    --bg-texture2: rgba(200, 150, 58, 0.03);
    --noise-opacity: 0.04;
    --scrollbar-track: #0a100d;
}

/* ── 主题 5: 落日沙 ── */
[data-theme="desert"] {
    --ink-deepest: #1a120c;
    --ink-deep: #221810;
    --ink-dark: #2c2018;
    --ink-medium: #3a2c20;
    --ink-light: #50402e;
    --ink-faint: #746050;
    --paper: #f0e0cc;
    --paper-warm: #dcc8aa;
    --paper-dim: #aa8e70;
    --vermillion: #d45830;
    --vermillion-glow: #ee6a3a;
    --vermillion-deep: #a03818;
    --vermillion-bg: rgba(212, 88, 48, 0.1);
    --jade: #88a060;
    --jade-dim: #6a8048;
    --success: #88a060;
    --warning: #d4a030;
    --danger: #d45830;
    --bg-texture1: rgba(212, 88, 48, 0.05);
    --bg-texture2: rgba(212, 160, 48, 0.04);
    --noise-opacity: 0.045;
    --scrollbar-track: #1a120c;
}

/* ================================================================
   基础重置
   ================================================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--ink-deepest);
    color: var(--paper);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 纹理背景（颜色跟随主题） */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, var(--bg-texture1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, var(--bg-texture2) 0%, transparent 50%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(128,128,128,0.005) 2px,
            rgba(128,128,128,0.005) 4px
        );
    pointer-events: none;
    z-index: 0;
}

/* 噪点纹理叠加 */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    opacity: var(--noise-opacity);
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

.page {
    position: relative;
    z-index: 1;
}

/* ================================================================
   登录/注册页
   ================================================================ */

#auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-lg);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
    animation: fadeUp 0.8s var(--ease-out) both;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 印章 */
.seal-stamp {
    display: inline-block;
    font-family: var(--font-fun);
    font-size: 3.5rem;
    color: var(--vermillion);
    border: 3px solid var(--vermillion);
    padding: 8px 16px;
    letter-spacing: 4px;
    position: relative;
    margin-bottom: var(--space-lg);
    transform: rotate(-3deg);
    animation: stampIn 0.6s var(--ease-spring) 0.3s both;
}

.seal-stamp::before {
    content: '';
    position: absolute;
    inset: -6px;
    border: 1px solid rgba(194, 59, 34, 0.3);
}

@keyframes stampIn {
    from { opacity: 0; transform: rotate(-3deg) scale(1.3); }
    to { opacity: 1; transform: rotate(-3deg) scale(1); }
}

.auth-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 8px;
    margin-bottom: var(--space-sm);
    color: var(--paper);
}

.auth-subtitle {
    font-size: 0.85rem;
    color: var(--paper-dim);
    letter-spacing: 4px;
    margin-bottom: var(--space-xl);
}

/* 选项卡 */
.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--ink-light);
}

.auth-tab {
    flex: 1;
    background: none;
    border: none;
    padding: var(--space-md);
    font-family: var(--font-display);
    font-size: 0.95rem;
    color: var(--paper-dim);
    cursor: pointer;
    letter-spacing: 2px;
    transition: all 0.3s var(--ease-out);
    position: relative;
}

.auth-tab::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--vermillion);
    transition: all 0.3s var(--ease-out);
    transform: translateX(-50%);
}

.auth-tab.active {
    color: var(--paper);
}

.auth-tab.active::after {
    width: 60%;
}

.auth-tab:hover {
    color: var(--paper);
}

/* 表单 */
.auth-form {
    text-align: left;
}

.input-group {
    margin-bottom: var(--space-md);
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--paper-dim);
    letter-spacing: 2px;
    margin-bottom: var(--space-xs);
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--ink-dark);
    border: 1px solid var(--ink-light);
    border-radius: var(--radius-sm);
    color: var(--paper);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.3s var(--ease-out);
    outline: none;
}

.input-group input::placeholder {
    color: var(--ink-faint);
}

.input-group input:focus {
    border-color: var(--vermillion);
    box-shadow: 0 0 0 3px var(--vermillion-bg);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--vermillion);
    color: var(--paper);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 4px;
    cursor: pointer;
    margin-top: var(--space-md);
    transition: all 0.3s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.btn-primary:hover {
    background: var(--vermillion-glow);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(194, 59, 34, 0.3);
}

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

.auth-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--paper-dim);
    margin-top: var(--space-md);
    letter-spacing: 1px;
}

.message {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    text-align: center;
    display: none;
    animation: fadeUp 0.3s var(--ease-out);
}

.message.show { display: block; }
.message.error {
    background: rgba(194, 59, 34, 0.15);
    color: var(--vermillion-glow);
    border: 1px solid rgba(194, 59, 34, 0.2);
}
.message.success {
    background: rgba(74, 140, 111, 0.15);
    color: var(--jade);
    border: 1px solid rgba(74, 140, 111, 0.2);
}

/* 墨滴装饰 */
.ink-drops {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.drop {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(194, 59, 34, 0.08) 0%, transparent 70%);
}

.drop-1 {
    width: 300px; height: 300px;
    top: 10%; left: -5%;
    animation: float 20s ease-in-out infinite;
}
.drop-2 {
    width: 200px; height: 200px;
    bottom: 15%; right: 5%;
    animation: float 15s ease-in-out 5s infinite reverse;
}
.drop-3 {
    width: 150px; height: 150px;
    top: 50%; right: 20%;
    animation: float 18s ease-in-out 8s infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -30px) scale(1.1); }
    66% { transform: translate(-15px, 20px) scale(0.95); }
}


/* ================================================================
   主应用 — 顶栏
   ================================================================ */

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--ink-deep);
    border-bottom: 1px solid var(--ink-medium);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-seal {
    font-family: var(--font-fun);
    font-size: 1.4rem;
    color: var(--vermillion);
    border: 2px solid var(--vermillion);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: rotate(-2deg);
}

.header-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--paper);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-badge {
    font-size: 0.8rem;
    color: var(--paper-dim);
    letter-spacing: 1px;
    margin-right: var(--space-sm);
    padding: 4px 12px;
    background: var(--ink-medium);
    border-radius: 20px;
}

.btn-icon {
    background: none;
    border: 1px solid transparent;
    color: var(--paper-dim);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    color: var(--paper);
    background: var(--ink-medium);
    border-color: var(--ink-light);
}

.btn-icon:hover svg {
    stroke: var(--vermillion);
}


/* ================================================================
   新建待办
   ================================================================ */

.new-todo-section {
    max-width: 720px;
    margin: var(--space-xl) auto 0;
    padding: 0 var(--space-lg);
}

.todo-form {
    background: var(--ink-dark);
    border: 1px solid var(--ink-medium);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: all 0.3s var(--ease-out);
}

.todo-form:focus-within {
    border-color: var(--vermillion);
    box-shadow: 0 0 0 3px var(--vermillion-bg), 0 8px 32px rgba(0,0,0,0.3);
}

.todo-form-main {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.todo-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: 1.1rem;
    padding: var(--space-sm) 0;
    outline: none;
    letter-spacing: 1px;
}

.todo-input::placeholder {
    color: var(--ink-faint);
    font-style: italic;
}

.btn-add {
    background: var(--vermillion);
    color: var(--paper);
    border: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    font-family: var(--font-fun);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    flex-shrink: 0;
}

.btn-add:hover {
    background: var(--vermillion-glow);
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(194, 59, 34, 0.4);
}

.todo-form-extra {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--ink-medium);
}

.deadline-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--paper-dim);
    white-space: nowrap;
}

.deadline-input {
    background: var(--ink-medium);
    border: 1px solid var(--ink-light);
    border-radius: var(--radius-sm);
    color: var(--paper);
    font-family: var(--font-body);
    font-size: 0.85rem;
    padding: 6px 10px;
    outline: none;
    transition: border-color 0.2s;
}

.deadline-input:focus {
    border-color: var(--vermillion);
}

/* Chrome datetime-local 适配 */
.deadline-input::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
    cursor: pointer;
}


/* ================================================================
   过滤栏
   ================================================================ */

.filter-section {
    max-width: 720px;
    margin: var(--space-lg) auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.filter-tabs {
    display: flex;
    gap: 2px;
    background: var(--ink-dark);
    border-radius: var(--radius-sm);
    padding: 3px;
}

.filter-tab {
    background: none;
    border: none;
    color: var(--paper-dim);
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 2px;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
}

.filter-tab.active {
    background: var(--ink-medium);
    color: var(--paper);
}

.filter-tab:hover:not(.active) {
    color: var(--paper);
}

.todo-stats {
    font-size: 0.8rem;
    color: var(--paper-dim);
    letter-spacing: 1px;
}


/* ================================================================
   待办列表
   ================================================================ */

.todo-list-section {
    max-width: 720px;
    margin: 0 auto var(--space-2xl);
    padding: 0 var(--space-lg);
}

.todo-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.todo-item {
    background: var(--ink-dark);
    border: 1px solid var(--ink-medium);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    transition: all 0.3s var(--ease-out);
    animation: slideIn 0.4s var(--ease-out) both;
    position: relative;
    overflow: hidden;
}

.todo-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--vermillion);
    opacity: 0;
    transition: opacity 0.3s;
}

.todo-item:hover {
    border-color: var(--ink-light);
    transform: translateX(4px);
}

.todo-item:hover::before {
    opacity: 1;
}

.todo-item.completed {
    opacity: 0.5;
}

.todo-item.completed .todo-text {
    text-decoration: line-through;
    color: var(--paper-dim);
}

.todo-item.overdue::before {
    opacity: 1;
    background: var(--danger);
    animation: pulse-bar 2s ease-in-out infinite;
}

@keyframes pulse-bar {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 复选框 */
.todo-checkbox {
    width: 22px;
    height: 22px;
    border: 2px solid var(--ink-faint);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
    transition: all 0.2s var(--ease-spring);
}

.todo-checkbox:hover {
    border-color: var(--vermillion);
    transform: scale(1.1);
}

.todo-checkbox.checked {
    background: var(--vermillion);
    border-color: var(--vermillion);
}

.todo-checkbox.checked::after {
    content: '✓';
    color: var(--paper);
    font-size: 0.75rem;
    font-weight: bold;
}

.todo-body {
    flex: 1;
    min-width: 0;
}

.todo-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--paper);
    letter-spacing: 0.5px;
    word-break: break-word;
}

.todo-meta {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xs);
    font-size: 0.75rem;
    color: var(--ink-faint);
    letter-spacing: 0.5px;
}

.todo-meta .overdue-text {
    color: var(--danger);
    font-weight: 600;
}

.todo-actions {
    display: flex;
    gap: var(--space-xs);
    opacity: 0;
    transition: opacity 0.2s;
}

.todo-item:hover .todo-actions {
    opacity: 1;
}

.btn-todo-action {
    background: none;
    border: none;
    color: var(--ink-faint);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all 0.15s;
}

.btn-todo-action:hover {
    color: var(--vermillion);
    background: var(--vermillion-bg);
}

.btn-todo-action.delete:hover {
    color: var(--danger);
}


/* ================================================================
   空状态
   ================================================================ */

.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--ink-faint);
    animation: fadeUp 0.6s var(--ease-out);
}

.empty-brush {
    font-family: var(--font-fun);
    font-size: 4rem;
    color: var(--ink-light);
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.9rem;
    letter-spacing: 4px;
    font-style: italic;
}


/* ================================================================
   模态框
   ================================================================ */

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--ink-dark);
    border: 1px solid var(--ink-medium);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--space-lg);
    animation: modalIn 0.3s var(--ease-out);
}

.modal-sm {
    max-width: 400px;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--ink-medium);
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    letter-spacing: 3px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--paper-dim);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: all 0.15s;
}

.modal-close:hover {
    color: var(--paper);
    background: var(--ink-medium);
}


/* ================================================================
   管理员面板
   ================================================================ */

.admin-users {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.admin-user-card {
    background: var(--ink-medium);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    transition: all 0.2s;
}

.admin-user-card:hover {
    background: var(--ink-light);
}

.admin-user-info {
    flex: 1;
}

.admin-user-name {
    font-weight: 600;
    letter-spacing: 1px;
    font-size: 0.95rem;
}

.admin-user-meta {
    font-size: 0.75rem;
    color: var(--paper-dim);
    margin-top: 2px;
    display: flex;
    gap: var(--space-md);
}

.admin-user-actions {
    display: flex;
    gap: var(--space-xs);
}

.btn-admin-action {
    padding: 6px 14px;
    border: 1px solid var(--ink-faint);
    border-radius: var(--radius-sm);
    background: none;
    color: var(--paper-dim);
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-admin-action:hover {
    border-color: var(--paper-dim);
    color: var(--paper);
}

.btn-admin-action.approve {
    border-color: var(--jade-dim);
    color: var(--jade);
}
.btn-admin-action.approve:hover {
    background: rgba(74, 140, 111, 0.15);
}

.btn-admin-action.reject {
    border-color: var(--vermillion-deep);
    color: var(--vermillion);
}
.btn-admin-action.reject:hover {
    background: var(--vermillion-bg);
}

.btn-admin-action.delete {
    border-color: var(--danger);
    color: var(--danger);
}
.btn-admin-action.delete:hover {
    background: rgba(194, 59, 34, 0.15);
}

/* 状态标签 */
.status-badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    letter-spacing: 1px;
    font-weight: 600;
}

.status-badge.approved {
    background: rgba(74, 140, 111, 0.2);
    color: var(--jade);
}

.status-badge.pending {
    background: rgba(196, 154, 42, 0.2);
    color: var(--warning);
}

.status-badge.rejected {
    background: rgba(194, 59, 34, 0.2);
    color: var(--vermillion);
}

.status-badge.admin {
    background: rgba(194, 59, 34, 0.15);
    color: var(--vermillion);
}


/* ================================================================
   通知设置
   ================================================================ */

.notify-desc {
    font-size: 0.8rem;
    color: var(--paper-dim);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.select-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--ink-medium);
    border: 1px solid var(--ink-light);
    border-radius: var(--radius-sm);
    color: var(--paper);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
    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='%239e9688' 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;
}

.select-input:focus {
    border-color: var(--vermillion);
}

.select-input option {
    background: var(--ink-dark);
    color: var(--paper);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--ink-faint);
    margin-top: var(--space-xs);
}

.schedule-section {
    margin-top: var(--space-lg);
}

.section-divider {
    font-size: 0.8rem;
    color: var(--paper-dim);
    letter-spacing: 3px;
    text-align: center;
    margin-bottom: var(--space-md);
    position: relative;
}

.section-divider::before,
.section-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 30%;
    height: 1px;
    background: var(--ink-medium);
}

.section-divider::before { left: 0; }
.section-divider::after { right: 0; }

.time-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--ink-medium);
    border: 1px solid var(--ink-light);
    border-radius: var(--radius-sm);
    color: var(--paper);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
}

.time-input:focus {
    border-color: var(--vermillion);
}

.time-input::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
    cursor: pointer;
}

.weekday-picker {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.weekday-chip {
    cursor: pointer;
}

.weekday-chip input {
    display: none;
}

.weekday-chip span {
    display: inline-block;
    width: 38px;
    height: 38px;
    line-height: 38px;
    text-align: center;
    border-radius: 50%;
    border: 1px solid var(--ink-light);
    color: var(--paper-dim);
    font-size: 0.85rem;
    transition: all 0.2s var(--ease-out);
}

.weekday-chip:hover span {
    border-color: var(--vermillion);
    color: var(--paper);
}

.weekday-chip input:checked + span {
    background: var(--vermillion);
    border-color: var(--vermillion);
    color: var(--paper);
    font-weight: 600;
}

.notify-btn-row {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.notify-btn-row .btn-primary {
    flex: 1;
}

.btn-send {
    flex: 1;
    padding: 14px;
    background: var(--jade);
    color: var(--paper);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 1rem;
    letter-spacing: 4px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
}

.btn-send:hover {
    background: var(--jade-dim);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.notify-status-bar {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
    color: var(--paper-dim);
    background: var(--ink-medium);
    border-radius: var(--radius-sm);
    letter-spacing: 0.5px;
    display: none;
}

.notify-status-bar.show {
    display: block;
}

.notify-guide {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--ink-medium);
}

.notify-guide h3 {
    font-size: 0.85rem;
    color: var(--paper-dim);
    letter-spacing: 2px;
    margin-bottom: var(--space-md);
}

.guide-badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 3px 10px;
    border-radius: 10px;
    letter-spacing: 1px;
    background: rgba(74, 140, 111, 0.2);
    color: var(--jade);
    margin-bottom: var(--space-md);
}

.guide-badge.warn {
    background: rgba(196, 154, 42, 0.2);
    color: var(--warning);
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.guide-step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.step-num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--vermillion);
    color: var(--paper);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}

.step-content {
    flex: 1;
    min-width: 0;
}

.step-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--paper);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.step-content p {
    font-size: 0.8rem;
    color: var(--ink-faint);
    line-height: 1.6;
    margin-bottom: 4px;
}

.step-content p:last-child {
    margin-bottom: 0;
}

.step-content strong {
    color: var(--paper-dim);
}

.step-content a {
    color: var(--vermillion);
    text-decoration: none;
    border-bottom: 1px solid var(--vermillion-bg);
    transition: border-color 0.2s;
}

.step-content a:hover {
    border-color: var(--vermillion);
}

.token-example {
    display: block;
    background: var(--ink-medium);
    border: 1px solid var(--ink-light);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-size: 0.75rem;
    color: var(--vermillion);
    font-family: 'Courier New', monospace;
    margin: 6px 0;
    word-break: break-all;
}


/* ================================================================
   Toast 通知
   ================================================================ */

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--ink-dark);
    border: 1px solid var(--ink-medium);
    color: var(--paper);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    letter-spacing: 1px;
    z-index: 2000;
    opacity: 0;
    transition: all 0.4s var(--ease-out);
    pointer-events: none;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.error {
    border-color: var(--vermillion);
}

.toast.success {
    border-color: var(--jade);
}


/* ================================================================
   响应式
   ================================================================ */

@media (max-width: 640px) {
    .app-header {
        padding: var(--space-sm) var(--space-md);
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .header-title {
        font-size: 0.9rem;
        letter-spacing: 2px;
    }

    .new-todo-section,
    .filter-section,
    .todo-list-section {
        padding: 0 var(--space-md);
    }

    .todo-form {
        padding: var(--space-md);
    }

    .todo-form-main {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .btn-add {
        width: 100%;
        height: 40px;
    }

    .filter-section {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-start;
    }

    .todo-item {
        padding: var(--space-md);
    }

    .todo-actions {
        opacity: 1;
    }

    .user-badge {
        display: none;
    }

    .seal-stamp {
        font-size: 2.5rem;
    }
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--ink-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--ink-faint);
}


/* ================================================================
   主题切换器
   ================================================================ */

.theme-switcher {
    position: relative;
}

.theme-toggle {
    background: none;
    border: 1px solid transparent;
    color: var(--paper-dim);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--paper);
    background: var(--ink-medium);
    border-color: var(--ink-light);
}

.theme-panel {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--ink-dark);
    border: 1px solid var(--ink-medium);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    z-index: 200;
    min-width: 180px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
    animation: modalIn 0.2s var(--ease-out);
}

.theme-panel.open {
    display: block;
}

.theme-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 8px 12px;
    border: none;
    background: none;
    color: var(--paper-dim);
    font-family: var(--font-body);
    font-size: 0.8rem;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    width: 100%;
    text-align: left;
    transition: all 0.15s;
}

.theme-option:hover {
    background: var(--ink-medium);
    color: var(--paper);
}

.theme-option.active {
    color: var(--vermillion);
}

.theme-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 2px solid var(--ink-light);
}

.theme-option.active .theme-dot {
    border-color: var(--vermillion);
    box-shadow: 0 0 0 2px var(--vermillion-bg);
}

/* 主题预览色点 */
.theme-dot[data-theme-preview="ink"]    { background: linear-gradient(135deg, #1a1a1f, #c23b22); }
.theme-dot[data-theme-preview="spring"] { background: linear-gradient(135deg, #f5f0e8, #d4577a); }
.theme-dot[data-theme-preview="cyber"]  { background: linear-gradient(135deg, #0a0a14, #00e5ff); }
.theme-dot[data-theme-preview="forest"] { background: linear-gradient(135deg, #15221a, #c8963a); }
.theme-dot[data-theme-preview="desert"] { background: linear-gradient(135deg, #2c2018, #d45830); }

/* 主题过渡动画 */
body {
    transition: background-color 0.4s var(--ease-out), color 0.4s var(--ease-out);
}

.app-header,
.todo-form,
.todo-item,
.modal-content,
.admin-user-card,
.filter-tabs {
    transition: background-color 0.4s var(--ease-out),
                border-color 0.4s var(--ease-out),
                color 0.3s var(--ease-out);
}

/* 浅色主题下日历选择器不需要 invert */
[data-theme="spring"] .deadline-input::-webkit-calendar-picker-indicator,
[data-theme="spring"] .time-input::-webkit-calendar-picker-indicator {
    filter: none;
}

/* 赛博主题印章特效 */
[data-theme="cyber"] .seal-stamp,
[data-theme="cyber"] .header-seal {
    text-shadow: 0 0 10px var(--vermillion), 0 0 30px var(--vermillion-bg);
    border-color: var(--vermillion);
    box-shadow: 0 0 15px var(--vermillion-bg);
}

[data-theme="cyber"] .btn-add:hover {
    box-shadow: 0 4px 20px rgba(0, 229, 255, 0.4);
}