/* ============================================================
   集卡装箱台账录入系统 - 登录页样式 v2.0
   现代化设计：渐变背景、毛玻璃卡片、微交互动效
   ============================================================ */

:root {
    --primary: #5b6af0;
    --primary-light: #7b8af8;
    --primary-dark: #4350d4;
    --primary-gradient: linear-gradient(135deg, #5b6af0 0%, #7c5cfc 50%, #a855f7 100%);
    --success: #10b981;
    --danger: #ef4444;
    --bg-primary: #f0f2f8;
    --bg-card: #ffffff;
    --border-light: #e8ecf1;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-inverse: #ffffff;
    --font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
    --shadow-xl: 0 16px 48px rgba(91,106,240,0.15), 0 4px 16px rgba(0,0,0,0.08);
    --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse 70% 50% at 50% -20%, rgba(91,106,240,0.12) 0%, transparent 100%),
        radial-gradient(ellipse 50% 40% at 80% 80%, rgba(168,85,247,0.08) 0%, transparent 100%),
        radial-gradient(ellipse 40% 40% at 20% 90%, rgba(16,185,129,0.06) 0%, transparent 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 装饰性背景网格 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(91,106,240,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91,106,240,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
}

/* ==================== 卡片容器 ==================== */
.wrap,
.install-box {
    position: relative;
    z-index: 1;
    max-width: 420px;
    width: 100%;
    margin: 20px;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255,255,255,0.6);
    animation: cardEnter 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes cardEnter {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 卡片顶部渐变条 */
.wrap::before,
.install-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* ==================== 标题 ==================== */
h2 {
    text-align: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== 描述文本 ==================== */
.install-box p {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 20px;
    line-height: 1.5;
}

/* ==================== 错误提示 ==================== */
.red {
    color: var(--danger);
    text-align: center;
    margin-bottom: 16px;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 10px 14px;
    background: rgba(239,68,68,0.06);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(239,68,68,0.15);
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* ==================== 表单 ==================== */
form {
    display: flex;
    flex-direction: column;
    gap: 0;
}

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

/* ==================== 输入框 ==================== */
input {
    width: 100%;
    padding: 13px 16px;
    margin: 8px 0;
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-sm);
    font-size: 0.938rem;
    background: rgba(249,250,251,0.8);
    color: var(--text-primary);
    transition: all var(--transition-base);
    box-sizing: border-box;
    font-family: var(--font-family);
}

input:hover {
    border-color: #cbd5e0;
    background: #fff;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(91,106,240,0.12), 0 2px 8px rgba(91,106,240,0.08);
    background: #fff;
    transform: translateY(-1px);
}

input::placeholder {
    color: #a0aec0;
    font-size: 0.875rem;
}

input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 30px white inset;
    -webkit-text-fill-color: var(--text-primary);
}

/* ==================== 按钮 ==================== */
button {
    width: 100%;
    padding: 14px;
    background: var(--primary-gradient);
    color: var(--text-inverse);
    border: 0;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-bounce);
    margin-top: 16px;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.02em;
    font-family: var(--font-family);
}

button::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(91,106,240,0.35);
}

button:hover::after {
    opacity: 1;
}

button:active {
    transform: scale(0.97);
    box-shadow: 0 2px 8px rgba(91,106,240,0.2);
}

button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ==================== 链接 ==================== */
a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}
a:hover {
    color: var(--primary-dark);
}

/* ==================== 响应式 ==================== */
@media screen and (max-width: 480px) {
    body {
        padding: 12px;
    }
    .wrap,
    .install-box {
        margin: 0;
        padding: 28px 20px;
        border-radius: var(--radius-md);
    }
    h2 {
        font-size: 1.25rem;
        margin-bottom: 20px;
    }
    input {
        padding: 12px 14px;
        font-size: 0.875rem;
        margin: 6px 0;
    }
    button {
        padding: 13px;
        font-size: 0.938rem;
        margin-top: 12px;
    }
}

@media screen and (max-width: 360px) {
    .wrap,
    .install-box {
        padding: 24px 16px;
    }
    h2 {
        font-size: 1.125rem;
    }
    input {
        padding: 10px 12px;
        font-size: 0.813rem;
    }
    button {
        padding: 12px;
        font-size: 0.875rem;
    }
}

/* ==================== 深色模式 ==================== */
@media (prefers-color-scheme: dark) {
    body {
        background: #0f172a;
        background-image:
            radial-gradient(ellipse 70% 50% at 50% -20%, rgba(91,106,240,0.15) 0%, transparent 100%),
            radial-gradient(ellipse 50% 40% at 80% 80%, rgba(168,85,247,0.1) 0%, transparent 100%);
    }
    body::before {
        background-image:
            linear-gradient(rgba(91,106,240,0.04) 1px, transparent 1px),
            linear-gradient(90deg, rgba(91,106,240,0.04) 1px, transparent 1px);
    }
    .wrap,
    .install-box {
        background: rgba(30,41,59,0.85);
        border-color: rgba(255,255,255,0.08);
    }
    h2 {
        background: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #c084fc 100%);
        -webkit-background-clip: text;
        background-clip: text;
    }
    input {
        background: rgba(15,23,42,0.6);
        border-color: #334155;
        color: #e2e8f0;
    }
    input:focus {
        background: rgba(15,23,42,0.8);
        border-color: #818cf8;
        box-shadow: 0 0 0 3px rgba(129,140,248,0.15);
    }
    input::placeholder {
        color: #64748b;
    }
    input:-webkit-autofill {
        -webkit-box-shadow: 0 0 0 30px #1e293b inset;
        -webkit-text-fill-color: #e2e8f0;
    }
    .red {
        background: rgba(239,68,68,0.1);
        border-color: rgba(239,68,68,0.2);
    }
}