:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-orange: #f97316;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-green: #22c55e;
    --border-color: rgba(148, 163, 184, 0.1);
    --glow-orange: rgba(249, 115, 22, 0.3);
    --glow-red: rgba(239, 68, 68, 0.4);
    --glow-blue: rgba(59, 130, 246, 0.3);
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* 背景效果 */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-blue));
    top: -200px;
    right: -100px;
    animation: float1 20s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    bottom: -100px;
    left: -100px;
    animation: float2 25s ease-in-out infinite;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float3 15s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-30px, 30px) rotate(120deg); }
    66% { transform: translate(20px, -20px) rotate(240deg); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(40px, -40px) rotate(180deg); }
}

@keyframes float3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
}

/* 容器 */
.container {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部 */
.header {
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 10px var(--glow-orange));
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero 区域 */
.hero {
    text-align: center;
    margin-bottom: 2rem;
}

.title {
    margin-bottom: 1.5rem;
}

.title-gradient {
    display: block;
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-cyan) 50%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.title-sub {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==================== 倒计时区域 ==================== */
.countdown-section {
    margin-bottom: 2rem;
}

.countdown-card {
    position: relative;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(249, 115, 22, 0.1));
    border: 2px solid var(--accent-red);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    overflow: hidden;
    transition: all 0.3s ease;
}

.countdown-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.countdown-card.urgent {
    animation: urgentPulse 1s ease-in-out infinite;
    border-color: var(--accent-red);
    box-shadow: 0 0 30px var(--glow-red), 0 0 60px var(--glow-red);
}

.countdown-card.critical {
    animation: criticalShake 0.5s ease-in-out infinite;
    border-color: var(--accent-red);
    box-shadow: 0 0 40px var(--glow-red), 0 0 80px var(--glow-red);
}

.countdown-card.safe {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(6, 182, 212, 0.1));
}

@keyframes urgentPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 0 30px var(--glow-red), 0 0 60px var(--glow-red);
    }
    50% { 
        transform: scale(1.02);
        box-shadow: 0 0 50px var(--glow-red), 0 0 100px var(--glow-red);
    }
}

@keyframes criticalShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.countdown-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.countdown-icon {
    font-size: 1.5rem;
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.countdown-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.countdown-card.safe .countdown-title {
    color: var(--accent-green);
}

.countdown-timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.time-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    min-width: 80px;
}

.time-value {
    font-family: 'Orbitron', monospace;
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1;
    text-shadow: 0 0 20px var(--glow-red);
    transition: all 0.3s ease;
}

.countdown-card.safe .time-value {
    text-shadow: 0 0 20px rgba(34, 197, 94, 0.5);
}

.countdown-card.urgent .time-value,
.countdown-card.critical .time-value {
    color: var(--accent-red);
    animation: numberFlash 0.5s ease-in-out infinite;
}

@keyframes numberFlash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.time-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 0.5rem;
}

.time-separator {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-secondary);
    animation: separatorBlink 1s ease-in-out infinite;
}

@keyframes separatorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* 进度条 */
.countdown-progress {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan), var(--accent-orange), var(--accent-red));
    border-radius: 4px;
    transition: width 1s linear;
    width: 100%;
}

/* 警告信息 */
.countdown-warning {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    animation: warningPulse 1s ease-in-out infinite;
}

.countdown-warning.show {
    display: flex;
}

@keyframes warningPulse {
    0%, 100% { background: rgba(239, 68, 68, 0.2); }
    50% { background: rgba(239, 68, 68, 0.4); }
}

.warning-icon {
    font-size: 1.2rem;
}

.warning-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-red);
}

/* 隐藏倒计时（未签到过时） */
.countdown-section.hidden {
    display: none;
}

/* ==================== 签到卡片 ==================== */
.checkin-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    backdrop-filter: blur(20px);
    margin-bottom: 3rem;
}

.card-glow {
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan), var(--accent-blue));
    border-radius: 25px;
    z-index: -1;
    opacity: 0.3;
    filter: blur(20px);
}

.card-content {
    position: relative;
}

/* 状态区域 */
.status-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pulse {
    width: 12px;
    height: 12px;
    background: var(--accent-orange);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.status-indicator.checked .pulse {
    background: var(--accent-green);
    animation: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.status-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

.status-indicator.checked .status-text {
    color: var(--accent-green);
}

.streak-info {
    text-align: right;
}

.streak-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.streak-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 表单 */
.checkin-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.input-group input {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: all 0.3s ease;
}

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

.input-group input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.input-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 签到按钮 */
.checkin-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
    border: none;
    border-radius: 12px;
    padding: 1.25rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
    font-family: inherit;
}

.checkin-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px var(--glow-orange);
}

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

.checkin-btn.checked {
    background: var(--accent-green);
}

.checkin-btn.urgent {
    background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
    animation: btnUrgent 0.5s ease-in-out infinite;
}

@keyframes btnUrgent {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.btn-icon {
    font-size: 1.2rem;
}

/* 上次签到 */
.last-checkin {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

/* 测试邮件按钮 */
.test-email-section {
    margin-top: 1.5rem;
    text-align: center;
}

.test-email-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.test-email-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
}

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

.last-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.last-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 信息卡片 */
.info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
}

.info-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.info-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 页脚 */
.footer {
    margin-top: auto;
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* 响应式 */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }

    .title-gradient {
        font-size: 2.5rem;
    }

    .title-sub {
        font-size: 1.5rem;
    }

    .checkin-card {
        padding: 1.5rem;
    }

    .status-section {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .streak-info {
        text-align: center;
    }

    .info-cards {
        grid-template-columns: 1fr;
    }

    .countdown-timer {
        gap: 0.25rem;
    }

    .time-block {
        padding: 0.75rem 1rem;
        min-width: 60px;
    }

    .time-value {
        font-size: 2rem;
    }

    .time-separator {
        font-size: 1.5rem;
    }
}

/* 成功动画 */
@keyframes success {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.checkin-card.success {
    animation: success 0.5s ease;
}

/* Toast 通知 */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 2rem;
    backdrop-filter: blur(20px);
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
}

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

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

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