/* assets/login.css —— 登录页面专属样式 */

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #f1f5f9 0%, #cbd5e1 100%);
    background-attachment: fixed;
    display: flex; justify-content: center; align-items: center;
    height: 100vh; margin: 0;
    transition: background 0.3s, color 0.3s;
}

html.dark-mode body {
    background: #0b0f19 !important;
    color: #f1f5f9 !important;
}

/* ============================================================
 * 登录卡片
 * ============================================================ */
.box {
    background: #ffffff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    width: 420px;
    position: relative;
    transition: background 0.3s, box-shadow 0.3s;
}
html.dark-mode .box {
    background: #111827 !important;
    border: 1px solid #1f2937 !important;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6) !important;
}

/* ============================================================
 * 主题切换按钮
 * ============================================================ */
.theme-toggle-btn {
    position: absolute; top: 20px; right: 20px;
    background: none; border: none; cursor: pointer;
    font-size: 16px; color: #64748b; padding: 6px 10px;
    border-radius: 6px; transition: background 0.2s;
}
.theme-toggle-btn:hover { background: rgba(0, 0, 0, 0.05); }
html.dark-mode .theme-toggle-btn { color: #9ca3af !important; }
html.dark-mode .theme-toggle-btn:hover { background: rgba(255, 255, 255, 0.08) !important; }

/* ============================================================
 * 标题区
 * ============================================================ */
.header-title { text-align: center; margin-bottom: 25px; }
.header-title h2 {
    margin: 0 0 8px 0;
    color: #0f172a;
    font-size: 22px;
    line-height: 1.3;
}
.header-title p { margin: 0; color: #64748b; font-size: 13px; }
html.dark-mode .header-title h2 { color: #f9fafb !important; }
html.dark-mode .header-title p  { color: #9ca3af !important; }

/* ============================================================
 * 表单
 * ============================================================ */
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; color: #334155; font-size: 14px; font-weight: 600; }
html.dark-mode label { color: #cbd5e1 !important; }

/* ⭐ 关键修复：input 显式指定背景与文字颜色 */
input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 14px;
    background: #f8fafc;
    color: #1e293b;
    transition: all 0.3s;
    outline: none;
}
input[type="text"]:focus,
input[type="password"]:focus {
    border-color: #2563eb;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}
html.dark-mode input[type="text"],
html.dark-mode input[type="password"] {
    background: #1f2937 !important;
    border: 1px solid #374151 !important;
    color: #f9fafb !important;
}
html.dark-mode input[type="text"]:focus,
html.dark-mode input[type="password"]:focus {
    border-color: #3b82f6 !important;
    background: #111827 !important;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2) !important;
}
html.dark-mode input::placeholder { color: #6b7280 !important; }

/* ============================================================
 * 登录按钮
 * ============================================================ */
button[type="submit"] {
    width: 100%;
    padding: 14px;
    background: #2563eb;
    border: none;
    color: white;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 10px;
    transition: background 0.2s;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}
button[type="submit"]:hover { background: #1d4ed8; }
button[type="submit"]:disabled {
    background: #cbd5e1;
    color: #64748b;
    cursor: not-allowed;
    box-shadow: none;
}
html.dark-mode button[type="submit"]:disabled {
    background: #374151 !important;
    color: #6b7280 !important;
}

/* ============================================================
 * 错误提示
 * ============================================================ */
.error {
    color: #dc2626; font-size: 13px;
    margin-bottom: 20px;
    background: #fef2f2;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid #fecaca;
}
html.dark-mode .error {
    background: #450a0a !important;
    color: #f87171 !important;
    border-color: #7f1d1d !important;
}

/* ============================================================
 * 页脚
 * ============================================================ */
.footer-info {
    text-align: center;
    margin-top: 25px;
    font-size: 12px;
    color: #94a3b8;
    border-top: 1px solid #e2e8f0;
    padding-top: 15px;
}
html.dark-mode .footer-info {
    border-top-color: #1f2937 !important;
    color: #6b7280 !important;
}

/* ============================================================
 * 拖动滑块验证
 * ============================================================ */
.drag-captcha-wrapper {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

.drag-track {
    position: relative;
    height: 46px;
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    border-radius: 9px;
    overflow: hidden;
    box-sizing: border-box;
    transition: border-color 0.2s, background 0.2s;
}
html.dark-mode .drag-track {
    background: #1f2937 !important;
    border-color: #374151 !important;
}

.drag-track.dragging {
    border-color: #3b82f6;
    background: #eff6ff;
}
html.dark-mode .drag-track.dragging {
    border-color: #3b82f6 !important;
    background: #1e3a8a !important;
}

.drag-track.verified {
    border-color: #22c55e;
    background: #f0fdf4;
}
html.dark-mode .drag-track.verified {
    border-color: #16a34a !important;
    background: #064e3b !important;
}

.drag-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #60a5fa, #3b82f6);
    pointer-events: none;
    opacity: 0.18;
    transition: opacity 0.2s;
}
.drag-track.verified .drag-progress {
    background: linear-gradient(90deg, #86efac, #22c55e);
    opacity: 0.3;
}

.drag-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 13px;
    color: #94a3b8;
    white-space: nowrap;
    pointer-events: none;
    z-index: 1;
    transition: color 0.2s;
    font-weight: 500;
}
.drag-track.dragging .drag-text { color: #2563eb; }
.drag-track.verified .drag-text {
    color: #16a34a;
    font-weight: 600;
}
html.dark-mode .drag-text { color: #6b7280 !important; }
html.dark-mode .drag-track.dragging .drag-text { color: #60a5fa !important; }
html.dark-mode .drag-track.verified .drag-text { color: #86efac !important; }

.drag-handle {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 46px;
    height: 38px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    font-size: 18px;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 7px;
    cursor: grab;
    z-index: 2;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
    touch-action: none;
}
.drag-handle:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}
.drag-handle.dragging {
    cursor: grabbing;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.5);
}
.drag-handle.verified {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow: 0 2px 6px rgba(34, 197, 94, 0.4);
    cursor: default;
    font-size: 20px;
}

.drag-tip {
    font-size: 12px;
    color: #94a3b8;
    text-align: center;
    margin-top: 8px;
    transition: color 0.2s;
}
.drag-track.dragging + .drag-tip { color: #2563eb; }
.drag-track.verified + .drag-tip { color: #16a34a; }
html.dark-mode .drag-tip { color: #6b7280 !important; }
html.dark-mode .drag-track.dragging + .drag-tip { color: #60a5fa !important; }
html.dark-mode .drag-track.verified + .drag-tip { color: #86efac !important; }