/* ==================== 基础重置 & 变量 ==================== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(20, 20, 35, 0.85);
    --border-card: rgba(255, 255, 255, 0.06);
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-hint: #5a5a70;
    --accent: #6c5ce7;
    --accent-glow: rgba(108, 92, 231, 0.35);
    --accent-hover: #7c6cf7;
    --success: #00d2a0;
    --success-glow: rgba(0, 210, 160, 0.3);
    --error: #ff6b6b;
    --error-glow: rgba(255, 107, 107, 0.3);
    --warning: #ffd93d;
    --radius: 16px;
    --radius-sm: 10px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::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);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    position: relative;
}

/* ==================== 背景画布 ==================== */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ==================== 容器 ==================== */
.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 2rem 1.25rem;
}

/* ==================== Logo 区域 ==================== */
.logo-area {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeSlideDown 0.8s ease-out;
}

.logo-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    color: var(--accent);
    filter: drop-shadow(0 0 20px var(--accent-glow));
    animation: float 3s ease-in-out infinite;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #e8e8f0 0%, #a0a0c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 1.75rem;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
    animation: fadeSlideUp 0.6s ease-out;
}

/* ==================== 输入组 ==================== */
.input-group {
    margin-bottom: 1.25rem;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.input-group input {
    width: 100%;
    padding: 0.85rem 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}

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

.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(108, 92, 231, 0.05);
}

.input-group input.error {
    border-color: var(--error);
    box-shadow: 0 0 0 3px var(--error-glow);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-hint);
    margin-top: 0.35rem;
}

/* ==================== 按钮 ==================== */
button, .btn-secondary {
    width: 100%;
    padding: 0.9rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

#submit-btn {
    background: linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
    color: white;
    margin-top: 0.5rem;
    box-shadow: 0 4px 16px var(--accent-glow);
}

#submit-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--accent-glow);
    background: linear-gradient(135deg, var(--accent-hover) 0%, #9b6df6 100%);
}

#submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

#submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 1rem;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* 按钮加载动画 */
.btn-loader {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
}

/* ==================== 错误提示 ==================== */
.error-msg {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.2);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-size: 0.85rem;
    animation: shake 0.4s ease;
}

/* ==================== 状态展示 ==================== */
.status-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.status-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.status-icon.pending {
    background: rgba(108, 92, 231, 0.15);
}

.status-icon.processing {
    background: rgba(108, 92, 231, 0.15);
}

.status-icon.success {
    background: rgba(0, 210, 160, 0.15);
}

.status-icon.failed {
    background: rgba(255, 107, 107, 0.15);
}

/* 旋转加载 */
.spinner {
    width: 24px;
    height: 24px;
    border: 2.5px solid rgba(108, 92, 231, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.status-icon.success .spinner,
.status-icon.failed .spinner {
    display: none;
}

.status-icon.success::after {
    content: '✓';
    font-size: 1.4rem;
    color: var(--success);
}

.status-icon.failed::after {
    content: '✗';
    font-size: 1.4rem;
    color: var(--error);
}

.status-text {
    font-size: 1.1rem;
    font-weight: 600;
}

.status-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent);
}

.status-icon.success ~ .status-text {
    color: var(--success);
}

.status-icon.failed ~ .status-text {
    color: var(--error);
}

.status-email {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-hint);
}

/* ==================== 页脚 ==================== */
.footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-hint);
    line-height: 1.6;
    animation: fadeIn 1s ease-out 0.4s both;
}

/* ==================== 动画 ==================== */
@keyframes fadeSlideDown {
    from { opacity: 0; transform: translateY(-16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

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

/* ==================== 响应式 ==================== */
@media (max-width: 480px) {
    .container {
        padding: 1.5rem 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 1.25rem;
    }
}