/* ============================================================
   沙漠缓风 — 仅改视觉，选择器保持不变
   ============================================================ */

:root {
    --ink: #4a433e;
    --ink-soft: #6a625c;
    --muted: #8a8178;
    --paper: rgba(255, 251, 247, 0.72);
    --line: rgba(90, 74, 64, 0.12);
    --field: rgba(255, 255, 255, 0.55);
    --accent: #b07a62;
    --accent-hover: #9a6752;
    --sage: #7d9a86;
    --rose: #c45c5c;
    --shadow: 0 18px 50px rgba(90, 70, 55, 0.14);
    --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

html, body {
    font-family: var(--font);
    color: var(--ink);
}

/* ---------- 沙漠天空 + 底部沙丘 ---------- */
.gradient-bg {
    background: linear-gradient(180deg, #f3c98a 0%, #e8b56a 38%, #d49252 70%, #c47a42 100%);
    position: relative;
    overflow: hidden;
    color: var(--ink);
}

.bg-orbs {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 22%;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

.sand-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.sand-far,
.sand-mid,
.sand-near {
    filter: blur(1.4px);
}

.sand-far { fill: #e6c48a; opacity: 0.55; }
.sand-mid { fill: #d49a58; opacity: 0.72; }
.sand-near { fill: #b07038; opacity: 0.88; }

.sand-dust {
    position: absolute;
    left: -20%;
    width: 140%;
    bottom: 0;
    height: 38%;
    background: repeating-linear-gradient(
        105deg,
        transparent 0 28px,
        rgba(255, 244, 220, 0.1) 28px 30px,
        transparent 30px 64px
    );
    filter: blur(7px);
    opacity: 0.45;
    -webkit-mask-image: linear-gradient(to top, #000 0%, transparent 100%);
    mask-image: linear-gradient(to top, #000 0%, transparent 100%);
    animation: dustSweep 18s linear infinite;
}

@keyframes dustSweep {
    0% { transform: translateX(0); }
    100% { transform: translateX(-48px); }
}

.gradient-bg > * {
    position: relative;
    z-index: 3;
}

.gradient-bg > .bg-orbs {
    position: absolute;
    z-index: 1;
}

/* ---------- 瓷感卡片 ---------- */
.auth-card {
    background: var(--paper);
    backdrop-filter: blur(22px) saturate(1.15);
    -webkit-backdrop-filter: blur(22px) saturate(1.15);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 44px 32px 38px;
    position: relative;
}

.brand-mark {
    width: 52px;
    height: 52px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: linear-gradient(160deg, #c9927a 0%, var(--accent) 100%);
    color: #fff8f4;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 18px rgba(176, 122, 98, 0.28);
}

.auth-heading {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.auth-title {
    font-size: 1.45rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0.12em;
    line-height: 1.2;
}

.auth-script {
    margin-top: 2px;
    font-family: "Great Vibes", "Segoe Script", "Lucida Handwriting", cursive;
    font-size: 1.55rem;
    font-weight: 400;
    color: var(--accent);
    letter-spacing: 0.04em;
    line-height: 1.2;
    opacity: 0.88;
}

.auth-sub {
    color: var(--muted);
    font-size: 0.875rem;
    margin-top: 4px;
}

.field-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 550;
    color: var(--ink-soft);
    margin-bottom: 8px;
    letter-spacing: 0.04em;
}

.field-label i {
    color: var(--accent);
    margin-right: 6px;
}

.field-input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    background: var(--field);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: inset 0 1px 2px rgba(90, 70, 55, 0.04);
    color: var(--ink);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.field-input::placeholder {
    color: #b3a89e;
}

.field-input:focus {
    background: rgba(255, 255, 255, 0.88);
    border-color: rgba(176, 122, 98, 0.45);
    box-shadow: 0 0 0 3px rgba(176, 122, 98, 0.12);
}

.field-wrap {
    position: relative;
}

.field-wrap .field-input {
    padding-right: 44px;
}

.field-wrap-actions .field-input {
    padding-right: 72px;
}

.icon-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted);
    background: none;
    border: none;
    cursor: pointer;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: color 0.15s, background 0.15s, opacity 0.15s;
}

.icon-btn:hover {
    color: var(--accent);
    background: rgba(176, 122, 98, 0.1);
}

.clear-auto-btn {
    right: 36px;
    opacity: 0;
    pointer-events: none;
}

.field-wrap-actions:hover .clear-auto-btn,
.field-wrap-actions:focus-within .clear-auto-btn,
.clear-auto-btn:focus {
    opacity: 1;
    pointer-events: auto;
}

.clear-auto-btn:hover {
    color: var(--rose);
    background: rgba(196, 92, 92, 0.1);
}

.clear-auto-btn::after {
    content: attr(data-tip);
    position: absolute;
    right: 0;
    bottom: calc(100% + 8px);
    white-space: nowrap;
    background: rgba(74, 67, 62, 0.92);
    color: #fff8f4;
    font-size: 12px;
    font-weight: 500;
    line-height: 1;
    padding: 7px 10px;
    border-radius: 8px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(4px);
    transition: opacity 0.15s, transform 0.15s;
    z-index: 8;
}

.clear-auto-btn:hover::after,
.clear-auto-btn:focus::after {
    opacity: 1;
    transform: translateY(0);
}

.btn-primary,
.btn-secondary,
.btn-success,
.btn-accent,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 12px 16px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff8f4;
    box-shadow: 0 8px 18px rgba(176, 122, 98, 0.22);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-success {
    background: var(--sage);
    color: #f6fbf7;
}

.btn-success:hover { filter: brightness(1.05); }

.btn-accent {
    background: #c9a36a;
    color: #fffaf2;
}

.btn-accent:hover { filter: brightness(1.05); }

.btn-secondary {
    background: #6a625c;
    color: #fff8f4;
}

.btn-secondary:hover { background: #4a433e; }

.btn-ghost {
    background: rgba(255, 255, 255, 0.45);
    color: var(--ink-soft);
    border: 1px solid var(--line);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.7); }

.flex > .btn-primary,
.flex > .btn-secondary,
.flex > .btn-success,
.flex > .btn-accent,
.flex > .btn-ghost {
    width: auto;
}

.btn-send {
    white-space: nowrap;
    padding: 12px 14px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff8f4;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

.btn-send:hover { background: var(--accent-hover); }

.auth-links {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.auth-links button {
    background: none;
    border: none;
    color: var(--ink-soft);
    font-size: 0.8rem;
    cursor: pointer;
    padding: 4px 0;
}

.auth-links button i {
    color: var(--accent);
}

.auth-links button:hover {
    color: var(--accent);
}

.hint-warn {
    color: #b07a62;
    font-size: 0.75rem;
}

.captcha-img {
    height: 44px;
    min-width: 108px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--line);
    cursor: pointer;
    object-fit: contain;
}

.section-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink);
    text-align: center;
    margin-bottom: 20px;
    letter-spacing: 0.06em;
}

.section-title i {
    color: var(--accent);
    margin-right: 8px;
}

.glass-effect {
    background: var(--paper);
    backdrop-filter: blur(22px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 24px;
    box-shadow: var(--shadow);
    position: relative;
    color: var(--ink);
}

/* ---------- 弹窗 ---------- */
#device-confirmation-overlay,
#device-limit-overlay {
    backdrop-filter: blur(10px);
    background: rgba(74, 67, 62, 0.35);
}

#device-confirmation-overlay .w-16 {
    background: #c9a36a;
}

#countdown-timer {
    color: var(--accent);
    font-weight: 700;
}

#device-confirmation-overlay .bg-black,
#device-limit-overlay .bg-black {
    background: rgba(255, 255, 255, 0.4) !important;
    border: 1px solid var(--line);
}

#device-confirmation-overlay .bg-yellow-500 {
    background: rgba(244, 214, 176, 0.45) !important;
    border: 1px solid rgba(201, 163, 106, 0.4);
}

#device-confirmation-overlay .stars {
    display: none;
}

/* ---------- 消息提示 ---------- */
.shake {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

.floating-message {
    position: fixed;
    top: 16vh;
    left: 50%;
    transform: translateX(-50%) translateY(-40px);
    min-width: 280px;
    max-width: 400px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 251, 247, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 10000;
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
}

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

.floating-message-success {
    background: rgba(232, 245, 236, 0.95);
    border-color: #b7d4c0;
    color: #3d6b4f;
}

.floating-message-error {
    background: rgba(250, 232, 228, 0.95);
    border-color: #e8c4bc;
    color: #8a3f3f;
}

.floating-message i {
    font-size: 16px;
    margin-right: 10px;
}

.floating-message .close-btn {
    background: rgba(74, 67, 62, 0.08);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: inherit;
    cursor: pointer;
    margin-left: 10px;
}

.floating-message .close-btn:hover {
    background: rgba(74, 67, 62, 0.14);
}

.floating-message .close-btn i {
    font-size: 11px;
    margin: 0;
}

@media (max-width: 768px) {
    .floating-message {
        top: 12vh;
        left: 12px;
        right: 12px;
        width: auto;
        min-width: auto;
        max-width: none;
        transform: translateY(-20px);
    }

    .floating-message.show {
        transform: translateY(0);
    }

    .auth-card {
        padding: 36px 22px 30px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sand-svg animate,
    .sand-dust {
        animation: none;
    }

    .sand-svg animate {
        display: none;
    }
}