/* =====================================================================
 * 加密软件 —— 深色科技 + 奢华金属风格
 * 面向手机自适应：视口安全区、触控友好、响应式字号、横屏适配
 * ===================================================================== */

:root {
    --bg-1: #0a0e1a;
    --bg-2: #101830;
    --panel: rgba(18, 24, 42, 0.86);
    --panel-solid: #141a2e;
    --gold: #d4af37;
    --gold-bright: #f0cf6b;
    --gold-glow: rgba(212, 175, 55, 0.35);
    --cyan: #00e5ff;
    --cyan-deep: #00b8d4;
    --cyan-glow: rgba(0, 229, 255, 0.30);
    --text: #e6e8f0;
    --text-dim: #8a93a8;
    --line: rgba(138, 147, 168, 0.28);
    --danger: #ff6b6b;
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(1100px 520px at 50% -12%, #1a2440, var(--bg-1)),
        linear-gradient(180deg, var(--bg-2), var(--bg-1));
    background-attachment: fixed;
    color: var(--text);
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
}

.app {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: calc(22px + env(safe-area-inset-top)) 16px calc(40px + env(safe-area-inset-bottom));
}

/* 首页 / 选择页：占满视口高度，让页脚贴近底部 */
.app.home {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 顶部标题 ===== */
.app-header {
    position: relative;
    text-align: center;
    margin-bottom: 18px;
}

.app-title {
    margin: 0;
    font-size: clamp(22px, 6.5vw, 28px);
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--gold-bright);
    text-shadow: 0 0 20px var(--gold-glow);
    position: relative; /* 作为右侧图标的定位基准 */
}

/* 标题右侧安全图标：固定右侧、垂直居中于标题行，不占用文字空间 */
.title-icon {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 78px;
    height: 78px;
    object-fit: contain;
    pointer-events: none;
}

/* 首页标题：绿色 */
.app-title.title-green {
    color: #3dfc86;
    text-shadow: 0 0 20px rgba(61, 252, 134, 0.35);
}

/* 安全通话标题：蓝色 */
.app-title.title-blue {
    color: var(--cyan);
    text-shadow: 0 0 20px var(--cyan-glow);
}

.app-subtitle {
    margin: 8px 0 0;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--text-dim);
}

/* ===== 字段 ===== */
.field {
    margin-bottom: 14px;
}

.field-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}

.label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}

.label-row .field-label {
    margin-bottom: 0;
}

.btn-copy {
    flex: 0 0 auto;
    min-height: 32px;
    padding: 4px 14px;
    font-size: 13px;
    letter-spacing: 1px;
    color: var(--text-dim);
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid var(--line);
    border-radius: 6px;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.btn-copy:active {
    color: var(--text);
    background: rgba(0, 229, 255, 0.16);
}

/* 复制成功状态：绿色，持续 2 秒 */
.btn-copy.copied {
    color: #3dfc86;
    background: rgba(61, 252, 134, 0.12);
    border-color: rgba(61, 252, 134, 0.5);
}

/* 清空成功状态：红色，持续 2 秒 */
.btn-copy.cleared {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.12);
    border-color: rgba(255, 107, 107, 0.5);
}

.input-row {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

input[type="text"],
input[type="password"],
textarea {
    width: 100%;
    padding: 12px 13px;
    background: rgba(8, 12, 24, 0.72);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    font-size: 16px; /* >=16px 避免 iOS 自动缩放 */
    font-family: inherit;
    outline: none;
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

/* 口令框禁止选中文本：Android 长按不出现复制菜单，且不影响正常输入 */
#passphrase {
    -webkit-user-select: none;
    user-select: none;
}

input[type="text"],
input[type="password"] {
    min-height: 48px;
}

input[type="text"]:focus,
input[type="password"]:focus,
textarea:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.14);
}

textarea {
    resize: vertical;
    min-height: 58px;
}

.mono {
    font-family: "SF Mono", Consolas, "Courier New", monospace;
    font-size: 13.5px;
    word-break: break-all;
}

textarea[readonly] {
    color: var(--cyan);
    border-color: rgba(0, 229, 255, 0.30);
}

/* ===== 功能容器 ===== */
.module-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    background: var(--panel);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--line);
}

.module-gold {
    border-color: rgba(212, 175, 55, 0.38);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(212, 175, 55, 0.12);
}

.module-gold .module-head {
    background: linear-gradient(180deg, rgba(212, 175, 55, 0.16), rgba(212, 175, 55, 0.03));
    border-bottom: 1px solid rgba(212, 175, 55, 0.28);
}

.module-gold .module-title {
    color: var(--gold-bright);
}

.module-cyan {
    border-color: rgba(0, 229, 255, 0.34);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(0, 229, 255, 0.10);
}

.module-cyan .module-head {
    background: linear-gradient(180deg, rgba(0, 229, 255, 0.13), rgba(0, 229, 255, 0.02));
    border-bottom: 1px solid rgba(0, 229, 255, 0.26);
}

.module-cyan .module-title {
    color: var(--cyan);
}

.module-head {
    padding: 13px 16px;
}

.module-title {
    margin: 0;
    font-size: clamp(16px, 4.5vw, 18px);
    font-weight: 600;
    letter-spacing: 2px;
}

.module-body {
    padding: 16px 16px 4px;
}

/* ===== 按钮 ===== */
button {
    font-family: inherit;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    border: none;
    border-radius: 8px;
}

.btn {
    width: 100%;
    min-height: 48px;
    padding: 12px 16px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.btn-gold {
    background: linear-gradient(135deg, #b8942e, var(--gold-bright));
    color: #1a1400;
    box-shadow: 0 4px 16px var(--gold-glow);
}

.btn-gold:active {
    opacity: 0.86;
}

.btn-cyan {
    background: linear-gradient(135deg, var(--cyan-deep), var(--cyan));
    color: #001a1f;
    box-shadow: 0 4px 16px var(--cyan-glow);
}

.btn-cyan:active {
    opacity: 0.86;
}

.btn-ghost {
    flex: 0 0 auto;
    min-height: 44px;
    padding: 0 16px;
    background: rgba(0, 229, 255, 0.10);
    color: var(--cyan);
    border: 1px solid rgba(0, 229, 255, 0.35);
    font-size: 14px;
    letter-spacing: 1px;
}

.btn-ghost:active {
    background: rgba(0, 229, 255, 0.20);
}

/* ===== 字符计数 ===== */
.char-count {
    margin-top: 4px;
    text-align: right;
    font-size: 12px;
    color: var(--text-dim);
}

.char-count.over {
    color: var(--danger);
}

/* ===== 弹窗 ===== */
.modal-mask {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.62);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-mask.hidden {
    display: none;
}

.modal {
    width: min(84%, 380px);
    max-height: 78vh;
    overflow-y: auto;
    background: var(--panel-solid);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 26px 20px 20px;
    text-align: center;
    box-shadow: 0 12px 44px rgba(0, 0, 0, 0.55);
}

.modal-text {
    margin: 0 0 22px;
    font-size: 17px;
    color: var(--text);
    letter-spacing: 1px;
    word-break: break-all;
}

/* 弹窗图片（如身份确认成功图） */
.modal-img {
    display: block;
    width: 110px;
    height: 110px;
    margin: 0 auto 16px;
    border-radius: 12px;
    object-fit: contain;
}

.modal-img.hidden {
    display: none;
}

.modal .btn {
    margin-bottom: 0;
}

/* ===== 返回链接 ===== */
.back-link {
    position: absolute;
    left: 0;
    top: 2px;
    z-index: 2; /* 高于标题层，避免被占满整行的标题盒子挡住点击 */
    min-height: 36px;
    padding: 6px 14px;
    font-size: 14px;
    letter-spacing: 1px;
    color: var(--text-dim);
    text-decoration: none;
    background: rgba(18, 24, 42, 0.6);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.back-link:active {
    color: var(--text);
}

/* ===== 首页导航 / 选择页 ===== */
.home-nav {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-top: 8px;
}

.nav-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 30px 20px;
    border-radius: 18px;
    text-decoration: none;
    background: var(--panel);
    border: 1px solid var(--line);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.16s ease;
}

.nav-card:active {
    transform: scale(0.98);
}

.nav-title {
    font-size: clamp(20px, 5.5vw, 24px);
    font-weight: 700;
    letter-spacing: 4px;
}

.nav-desc {
    font-size: 13px;
    letter-spacing: 1px;
    color: var(--text-dim);
}

.nav-card-gold {
    border-color: rgba(212, 175, 55, 0.42);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(212, 175, 55, 0.12);
}

.nav-card-gold .nav-title {
    color: var(--gold-bright);
}

.nav-card-cyan {
    border-color: rgba(0, 229, 255, 0.38);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(0, 229, 255, 0.10);
}

.nav-card-cyan .nav-title {
    color: var(--cyan);
}

/* 选择页：卡片拉伸填满剩余高度（消除底部空白） */
.home-nav.stretch {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.home-nav.stretch .nav-card {
    flex: 1;
    justify-content: center;
}

/* 导航卡片图标 */
.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
}

.nav-card-gold .nav-icon {
    color: var(--gold-bright);
}

.nav-card-cyan .nav-icon {
    color: var(--cyan);
}

/* 选择页状态卡容器 */
.status-card {
    margin-top: 14px;
}

/* 页脚标语 */
.app-footer {
    margin-top: auto;
    padding-top: 26px;
    text-align: center;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--text-dim);
}

/* ===== 首页日期卡片 ===== */
.date-card {
    margin-top: 18px;
    padding: 14px 16px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 14px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.date-card input[type="date"] {
    width: 100%;
    padding: 11px 12px;
    margin-top: 8px;
    background: rgba(8, 12, 24, 0.72);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    font-size: 16px;
    font-family: inherit;
    outline: none;
    color-scheme: dark; /* 原生日期控件跟随深色主题 */
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.date-card input[type="date"]:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px var(--gold-glow);
}

/* 口令标签与日期输入框保持间隔（与"日期"标签上下的留白视觉一致） */
.date-card > .field-label + input + .field-label {
    margin-top: 16px;
}

/* ===== 功能页当前日期提示 ===== */
.cur-date {
    margin: 14px 0;
    padding: 9px 12px;
    text-align: center;
    font-size: 13px;
    letter-spacing: 1px;
    color: #3dfc86; /* 绿色 */
    background: #000;
    border: 1px solid rgba(61, 252, 134, 0.35);
    border-radius: 10px;
}

/* 日期为过去/未来时：橙色 */
.cur-date.warn {
    color: #ffa940;
    border-color: rgba(255, 169, 64, 0.4);
}

/* ===== 功能页口令状态提示 ===== */
.pass-status {
    margin: 0 0 14px;
    padding: 9px 12px;
    text-align: center;
    font-size: 13px;
    letter-spacing: 1px;
    background: #000;
    border-radius: 10px;
}

.pass-status.ok {
    color: #3dfc86;
    border: 1px solid rgba(61, 252, 134, 0.35);
}

.pass-status.no {
    color: #ff6b6b;
    border: 1px solid rgba(255, 107, 107, 0.35);
}

/* 口令已输入但长度/格式不符合要求：橙色 */
.pass-status.warn {
    color: #ffa940;
    border: 1px solid rgba(255, 169, 64, 0.4);
}

/* =====================================================================
 * 安全文件模块（新增）：文件选择、文件信息行、取件码展示区、
 * 加载态按钮、首页第三张导航卡配色（紫色）
 * ===================================================================== */

/* 文件选择框 */
.file-input {
    display: block;
    width: 100%;
    padding: 10px 12px;
    background: rgba(8, 12, 24, 0.72);
    border: 1px dashed var(--line);
    border-radius: 8px;
    color: var(--text-dim);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
}

.file-input:focus {
    outline: none;
    border-color: var(--gold);
}

/* 已选文件信息行（文件名 + 大小） */
.file-info {
    margin: 10px 0 0;
    padding: 9px 12px;
    font-size: 13px;
    letter-spacing: 1px;
    color: var(--cyan);
    background: #000;
    border: 1px solid rgba(0, 229, 255, 0.30);
    border-radius: 10px;
    word-break: break-all;
}

.file-info.hidden,
.code-card.hidden {
    display: none;
}

/* 取件码展示区 / 还原结果区 */
.code-card {
    margin-bottom: 14px;
    padding: 12px 14px;
    background: rgba(8, 12, 24, 0.72);
    border: 1px solid var(--line);
    border-radius: 12px;
}

/* 取件码：等宽大字号 */
.code-value {
    margin: 4px 0 10px;
    text-align: center;
    font-family: "SF Mono", Consolas, "Courier New", monospace;
    font-size: clamp(24px, 8vw, 34px);
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--gold-bright);
    text-shadow: 0 0 16px var(--gold-glow);
    word-break: break-all;
}

.code-tip {
    margin: 0;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-dim);
}

/* 操作期间按钮加载态 */
.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    box-shadow: none;
}

/* 处理中遮罩：全屏半透明 + 居中提示，物理阻挡后续点击（元素由 common.js 动态创建） */
.busy-mask {
    position: fixed;
    inset: 0;
    z-index: 90; /* 低于弹窗(100)，保证错误弹窗能盖在遮罩之上 */
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    cursor: progress;
}

.busy-mask.hidden {
    display: none;
}

.busy-text {
    padding: 14px 22px;
    font-size: 15px;
    letter-spacing: 2px;
    text-align: center;
    color: var(--gold-bright);
    background: rgba(8, 12, 20, 0.94);
    border: 1px solid rgba(0, 229, 255, 0.35);
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* 首页第三张导航卡：紫色（安全文件） */
.nav-card-purple {
    border-color: rgba(168, 120, 255, 0.42);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(168, 120, 255, 0.12);
}

.nav-card-purple .nav-title {
    color: #c9a4ff;
}

.nav-card-purple .nav-icon {
    color: #c9a4ff;
}

/* ===== 手机适配 ===== */
/* 小屏（<=360px）进一步收紧 */
@media (max-width: 360px) {
    .app {
        padding-left: 10px;
        padding-right: 10px;
    }
    .module-body {
        padding: 14px 12px 4px;
    }
    .nav-card {
        padding: 24px 14px;
    }
}

/* 横屏：导航卡片横向排列，节省纵向空间 */
@media (orientation: landscape) and (max-height: 520px) {
    .app {
        max-width: 720px;
        padding-top: calc(12px + env(safe-area-inset-top));
        padding-bottom: calc(16px + env(safe-area-inset-bottom));
    }
    .app-header {
        margin-bottom: 8px;
    }
    .app-footer {
        padding-top: 12px;
    }
    .app-subtitle {
        margin-top: 2px;
    }
    .home-nav,
    .home-nav.stretch {
        flex-direction: row;
        gap: 14px;
    }
    .nav-card {
        flex: 1;
        gap: 4px;
        padding: 16px 14px;
    }
    .nav-icon svg {
        width: 28px;
        height: 28px;
    }
    /* 状态卡并排：日期 + 口令状态 一行显示 */
    .status-card {
        display: flex;
        gap: 10px;
        margin-top: 6px;
    }
    .status-card .cur-date,
    .status-card .pass-status {
        flex: 1;
        margin: 0;
        padding: 7px 10px;
    }
}