* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: auto;
}

/*
 * ─── VIEWPORT HEIGHT FIX ────────────────────────────────────
 * Safari 100vh bao gồm address bar → content bị cắt.
 *
 * Giải pháp: dùng các unit mới:
 *   dvh – dynamic viewport height: đổi theo address bar show/hide
 *   svh – small viewport height: height khi address bar ĐANG hiện (nhỏ nhất, safe)
 *   lvh – large viewport height: height khi address bar ẩn (lớn nhất)
 *
 * Support: Safari 15.4+ (iOS 15.4+), Chrome 108+, Firefox 101+
 * Fallback 100vh cho browser cũ.
 *
 * Tại đây:
 *   - body dùng dvh → cố gắng fill vùng thực sự nhìn thấy
 *   - fallback svh → nếu dvh không support, dùng vùng nhỏ nhất (safe, không bị cắt)
 *   - fallback 100vh → browser rất cũ
 * ─────────────────────────────────────────────────────────────
 */
html,
body {
    /* Stack fallback: browser đọc từ trên xuống, giữ lại line cuối cùng nó hiểu */
    height: 100vh;
    /* fallback cũ nhất */
    height: 100svh;
    /* fallback: safe = không bị address bar cắt */
    height: 100dvh;
    /* ideal: dynamic, đổi khi address bar animate */
    overflow: hidden;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: #a5a5a5;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
    width: 100%;
    max-width: 72rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Phone Mockup */
.phone-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-mockup {
    width: 380px;
    height: 780px;
    border-radius: 48px;
    background: #171717;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid #262626;
    position: relative;
    overflow: hidden;
}

/* Dynamic Island */
.dynamic-island {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 130px;
    height: 30px;
    background: black;
    border-radius: 9999px;
    z-index: 60;
}

.dynamic-island-gloss {
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    overflow: hidden;
}

.dynamic-island-gloss::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), transparent);
}

.dynamic-island-camera {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    border-radius: 9999px;
    background: radial-gradient(closest-side, rgba(255, 255, 255, 0.12), rgba(0, 0, 0, 0.6));
    opacity: 0.6;
}

/* Side buttons */
.side-btn-left {
    position: absolute;
    left: -3px;
    top: 96px;
    width: 4px;
    height: 96px;
    background: #262626;
    border-radius: 0 4px 4px 0;
}

.side-btn-right {
    position: absolute;
    right: -3px;
    top: 128px;
    width: 4px;
    height: 64px;
    background: #262626;
    border-radius: 4px 0 0 4px;
}

/* Screen */
.phone-screen {
    position: absolute;
    inset: 0;
    background: #18191A;
    background-size: cover;
    background-position: center;
}

/* Desktop: viền điện thoại bên ngoài (frame mockup) */
.phone-frame {
    display: contents;
}

@media (min-width: 769px) {
    .phone-frame {
        display: block;
        padding: 10px;
        background: linear-gradient(145deg, #2a2a2a 0%, #1a1a1a 50%, #0d0d0d 100%);
        border-radius: 64px;
        box-shadow:
            0 0 0 4px #333,
            0 0 0 6px #1a1a1a,
            0 30px 60px -15px rgba(0, 0, 0, 0.5),
            inset 0 1px 0 rgba(255, 255, 255, 0.06);
    }
}

.phone-screen-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    display: none;
}

.phone-screen.has-bg .phone-screen-overlay {
    display: block;
}

.phone-content {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Chat Header */
.chat-header {
    flex-shrink: 0;
    padding: 32px 16px 8px;
    background: var(--header-bg, rgba(23, 23, 23, 0.95));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(38, 38, 38, 0.7);
    z-index: 10;
}

.phone-content.has-bg-image .chat-header {
    background: rgba(255, 255, 255, 0.08);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.chat-header-inner {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-btn {
    padding: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

.header-btn:hover {
    opacity: 0.7;
}

.avatar-container {
    position: relative;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 9999px;
    object-fit: cover;
    border: 1px solid #404040;
}

.status-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 14px;
    height: 14px;
    border-radius: 9999px;
    background: #10b981;
    border: 2px solid #171717;
}

.user-info {
    flex: 1;
    line-height: 1.2;
}

.user-name {
    color: white;
    font-weight: 600;
}

.user-status {
    font-size: 12px;
    color: #34d399;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Message List */
.message-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 8px 16px;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.message-list::-webkit-scrollbar {
    display: none;
}

.messages-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Message Bubble */
.message-row {
    display: flex;
    padding: 0 12px;
}

.message-row.left {
    justify-content: flex-start;
}

.message-row.right {
    justify-content: flex-end;
}

.message-bubble {
    max-width: 78%;
    padding: 8px 12px;
    font-size: 15px;
    line-height: 1.4;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message-bubble.left {
    border-radius: 16px;
    border-bottom-left-radius: 6px;
}

.message-bubble.right {
    border-radius: 16px;
    border-bottom-right-radius: 6px;
}

.message-bubble.icon-only {
    background: transparent !important;
    box-shadow: none !important;
    padding: 4px;
    font-size: 40px;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(62, 62, 62, 0.6);
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: 0s;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingBounce {

    0%,
    60%,
    100% {
        transform: translateY(0);
        opacity: 0.6;
    }

    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* Fingerprint: hiện sau tin nhắn cuối, phía trên thanh nhắn tin */
.fingerprint-wrap {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    padding-bottom: 85px;
    pointer-events: none;
    opacity: 0;
    z-index: 10;
}

.fingerprint-wrap.visible {
    pointer-events: auto;
    animation: fingerprint-fadein 2s ease-out forwards;
}

.fingerprint-wrap.visible .fingerprint-img {
    animation: fingerprint-shake 0.5s ease-in-out infinite;
    animation-delay: 2s;
    animation-fill-mode: both;
}

.fingerprint-wrap.held .fingerprint-img {
    animation: none;
}

@keyframes fingerprint-fadein {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fingerprint-shake {

    0%,
    100% {
        transform: rotate(-3deg);
    }

    50% {
        transform: rotate(3deg);
    }
}

.fingerprint-img {
    width: 94px;
    height: auto;
    object-fit: contain;
}

.fingerprint-img.img-desktop {
    display: none;
}

.fingerprint-img.img-mobile {
    display: block;
}

@media (min-width: 769px) {
    .fingerprint-img.img-desktop {
        display: block;
    }

    .fingerprint-img.img-mobile {
        display: none;
    }
}

/* Chat Input */
.chat-input-container {
    flex-shrink: 0;
    padding: 8px 12px 16px;
    background: var(--input-container-bg, linear-gradient(to top, #0a0a0a, rgba(10, 10, 10, 0.95)));
}

.phone-content.has-bg-image .chat-input-container {
    background: rgba(255, 255, 255, 0.08);
}

.chat-input-inner {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.input-btn {
    padding: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

.input-btn:hover {
    opacity: 0.7;
}

.input-wrapper {
    flex: 1;
    min-width: 0;
}

.input-pill {
    display: flex;
    align-items: center;
    border-radius: 9999px;
    padding: 0 8px;
    background: transparent;
    border: 1px solid rgba(64, 64, 64, 0.6);
}

.chat-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    color: #f5f5f5;
    font-size: 15px;
    padding: 8px;
}

.chat-input::placeholder {
    color: rgba(229, 229, 229, 0.6);
}

.send-btn {
    padding: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s;
}

/* SVG Icons & theme vars */
.phone-content {
    --icon-color: #FFFFFF;
    --header-bg: rgba(23, 23, 23, 0.95);
    --input-container-bg: linear-gradient(to top, #0a0a0a, rgba(10, 10, 10, 0.95));
}

.header-btn,
.input-btn {
    color: var(--icon-color);
}

.icon {
    width: 22px;
    height: 22px;
    stroke-width: 2.5;
    fill: none;
    stroke: currentColor;
}

.send-idle-emoji {
    display: none;
    font-size: 24px;
    line-height: 1;
}

.send-btn.emoji-mode .icon {
    display: none;
}

.send-btn.emoji-mode .send-idle-emoji {
    display: inline;
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.icon-check {
    width: 14px;
    height: 14px;
}

/* Hidden */
.hidden {
    display: none !important;
}

/* ========== LOCK SCREEN ========== */
.lock-screen {
    position: absolute;
    inset: 0;
    background: url('../images/ny/bg.jpeg') center/cover;
    z-index: 50;
    display: flex;
    flex-direction: column;
    transition: opacity 0.4s, transform 0.4s;
    overflow: hidden;
}

/* Hearts */
.hearts-container {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.heart-fly {
    position: absolute;
    bottom: -20px;
    font-size: 16px;
    opacity: 0.6;
    animation: heartFly 8s linear infinite;
}

.heart-fly:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
    animation-duration: 7s;
    font-size: 14px;
}

.heart-fly:nth-child(2) {
    left: 25%;
    animation-delay: 1.5s;
    animation-duration: 9s;
    font-size: 20px;
}

.heart-fly:nth-child(3) {
    left: 45%;
    animation-delay: 0.5s;
    animation-duration: 8s;
    font-size: 12px;
}

.heart-fly:nth-child(4) {
    left: 65%;
    animation-delay: 2s;
    animation-duration: 10s;
    font-size: 18px;
}

.heart-fly:nth-child(5) {
    left: 80%;
    animation-delay: 0.8s;
    animation-duration: 7s;
    font-size: 15px;
}

.heart-fly:nth-child(6) {
    left: 35%;
    animation-delay: 3s;
    animation-duration: 9s;
    font-size: 11px;
}

.heart-fly:nth-child(7) {
    left: 55%;
    animation-delay: 2.5s;
    animation-duration: 8s;
    font-size: 16px;
}

.heart-fly:nth-child(8) {
    left: 90%;
    animation-delay: 1s;
    animation-duration: 11s;
    font-size: 13px;
}

.heart-fly:nth-child(9) {
    left: 15%;
    animation-delay: 4s;
    animation-duration: 8s;
    font-size: 17px;
}

.heart-fly:nth-child(10) {
    left: 70%;
    animation-delay: 3.5s;
    animation-duration: 9s;
    font-size: 14px;
}

@keyframes heartFly {
    0% {
        transform: translateY(0) translateX(0) scale(1);
        opacity: 0.6;
    }

    100% {
        transform: translateY(-100vh) translateX(15px) scale(0.8);
        opacity: 0.2;
    }
}

/* Hearts passcode */
.hearts-passcode {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
}

.passcode-bears.show-couple~.hearts-passcode {
    opacity: 1;
}

.hearts-passcode .heart-fly {
    animation: heartFly 4s linear infinite;
}

.hearts-passcode .heart-fly:nth-child(1) {
    left: 5%;
    animation-delay: 0s;
    animation-duration: 3s;
    font-size: 14px;
}

.hearts-passcode .heart-fly:nth-child(2) {
    left: 15%;
    animation-delay: 0.3s;
    animation-duration: 3.5s;
    font-size: 18px;
}

.hearts-passcode .heart-fly:nth-child(3) {
    left: 25%;
    animation-delay: 0.1s;
    animation-duration: 2.8s;
    font-size: 12px;
}

.hearts-passcode .heart-fly:nth-child(4) {
    left: 35%;
    animation-delay: 0.5s;
    animation-duration: 4s;
    font-size: 16px;
}

.hearts-passcode .heart-fly:nth-child(5) {
    left: 45%;
    animation-delay: 0.2s;
    animation-duration: 3.2s;
    font-size: 20px;
}

.hearts-passcode .heart-fly:nth-child(6) {
    left: 55%;
    animation-delay: 0.4s;
    animation-duration: 2.5s;
    font-size: 14px;
}

.hearts-passcode .heart-fly:nth-child(7) {
    left: 65%;
    animation-delay: 0.6s;
    animation-duration: 3.8s;
    font-size: 18px;
}

.hearts-passcode .heart-fly:nth-child(8) {
    left: 75%;
    animation-delay: 0.15s;
    animation-duration: 3s;
    font-size: 11px;
}

.hearts-passcode .heart-fly:nth-child(9) {
    left: 85%;
    animation-delay: 0.45s;
    animation-duration: 2.7s;
    font-size: 16px;
}

.hearts-passcode .heart-fly:nth-child(10) {
    left: 95%;
    animation-delay: 0.25s;
    animation-duration: 3.5s;
    font-size: 14px;
}

.hearts-passcode .heart-fly:nth-child(11) {
    left: 10%;
    animation-delay: 1s;
    animation-duration: 2.8s;
    font-size: 13px;
}

.hearts-passcode .heart-fly:nth-child(12) {
    left: 30%;
    animation-delay: 1.2s;
    animation-duration: 3.2s;
    font-size: 17px;
}

.hearts-passcode .heart-fly:nth-child(13) {
    left: 50%;
    animation-delay: 1.1s;
    animation-duration: 2.6s;
    font-size: 15px;
}

.hearts-passcode .heart-fly:nth-child(14) {
    left: 70%;
    animation-delay: 1.3s;
    animation-duration: 3.4s;
    font-size: 19px;
}

.hearts-passcode .heart-fly:nth-child(15) {
    left: 90%;
    animation-delay: 1.15s;
    animation-duration: 2.9s;
    font-size: 12px;
}

.hearts-passcode .heart-fly:nth-child(16) {
    left: 20%;
    animation-delay: 1.8s;
    animation-duration: 3.6s;
    font-size: 16px;
}

.hearts-passcode .heart-fly:nth-child(17) {
    left: 40%;
    animation-delay: 1.5s;
    animation-duration: 2.4s;
    font-size: 14px;
}

.hearts-passcode .heart-fly:nth-child(18) {
    left: 60%;
    animation-delay: 1.7s;
    animation-duration: 3.1s;
    font-size: 18px;
}

.hearts-passcode .heart-fly:nth-child(19) {
    left: 80%;
    animation-delay: 1.4s;
    animation-duration: 2.7s;
    font-size: 13px;
}

.hearts-passcode .heart-fly:nth-child(20) {
    left: 2%;
    animation-delay: 2s;
    animation-duration: 3.3s;
    font-size: 15px;
}

.lock-screen.hide {
    opacity: 0;
    transform: scale(1.1);
    pointer-events: none;
}

.lock-screen-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
}

.lock-screen-content {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 60px 20px 30px;
}

/* Time & Date */
.lock-time-container {
    text-align: center;
    margin-bottom: 20px;
}

.lock-time {
    font-size: 72px;
    font-weight: 300;
    color: white;
    letter-spacing: -2px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.lock-date {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.3);
}

/* Notifications */
.lock-notifications {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-bottom: 16px;
}

.notification-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    border-radius: 20px;
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.notification-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateZ(0) scale(1.02);
}

.notification-card:active {
    transform: translateZ(0) scale(0.98);
}

.notification-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-icon svg {
    width: 39px;
    height: 39px;
    fill: #0084FF;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-title {
    font-size: 15px;
    font-weight: 600;
    color: white;
    margin-bottom: 2px;
}

.notification-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.notification-time {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    flex-shrink: 0;
}

/* Bottom controls */
.lock-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    margin-top: 15px;
}

.lock-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}

.lock-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lock-btn svg {
    width: 24px;
    height: 24px;
    stroke: white;
    stroke-width: 2;
    fill: none;
}

.lock-btn-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
}



/* ========== PASSCODE SCREEN ========== */
.passcode-screen {
    position: absolute;
    inset: 0;
    transition: opacity 0.5s ease-out;
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
    background: linear-gradient(rgba(80, 30, 55, 0.7),
            rgba(55, 20, 40, 0.75)),
        url('../images/ny/bg.jpeg') center/cover;
    z-index: 45;
    display: none;
    flex-direction: column;
    align-items: center;
    padding: 25px 20px 20px;
}

.passcode-screen.visible {
    display: flex;
}

.passcode-screen.hiding {
    opacity: 0;
    pointer-events: none;
}

.phone-content {
    opacity: 0;
    transition: opacity 0.5s ease-out;
}

.phone-content.visible {
    opacity: 1;
}

/* Bears */
.passcode-bears {
    position: relative;
    width: 100%;
    height: 220px;
}

.passcode-bear {
    position: absolute;
    top: 30%;
    transform: translateY(-50%);
    height: 250px;
    width: auto;
    object-fit: contain;
    transition: left 0.4s ease, right 0.4s ease;
}

.passcode-bear.left {
    left: 2%;
}

.passcode-bear.right {
    right: 2%;
    left: auto;
}

.passcode-title {
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.passcode-subtitle {
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
    margin-bottom: 16px;
}

.passcode-dots {
    display: flex;
    gap: 12px;
    margin-bottom: 30px;
}

.passcode-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.4);
    transition: all 0.2s;
}

.passcode-dot.filled {
    background: #fff;
    border-color: #fff;
}

.passcode-dot.error {
    border-color: #ff3b30;
    background: #ff3b30;
    animation: shake 0.4s;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

.passcode-keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    max-width: 320px;
    margin-top: auto;
    padding-bottom: 20px;
}

.passcode-btn {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    color: #fff;
    font-size: 28px;
    font-weight: 400;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    -webkit-tap-highlight-color: transparent;
}

.passcode-btn:active {
    background: rgba(255, 255, 255, 0.35);
    transform: scale(0.95);
}

.passcode-btn.empty {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    cursor: default;
}

.passcode-btn.empty:active {
    transform: none;
}

.passcode-cancel {
    margin-top: 24px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 16px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px 16px;
}

.passcode-cancel:hover {
    color: #fff;
}

/* Couple image */
.passcode-couple-img {
    position: absolute;
    left: 50%;
    top: 30%;
    transform: translate(-50%, -50%);
    height: 270px;
    width: auto;
    object-fit: contain;
    opacity: 0;
    pointer-events: none;
    transition: none;
}

.passcode-bears.show-couple .passcode-bear {
    opacity: 0;
}

.passcode-bears.show-couple .passcode-couple-img {
    opacity: 1;
    transition: opacity 0.8s ease-out 0.2s;
}

.passcode-bears.show-couple~.passcode-title,
.passcode-bears.show-couple~.passcode-subtitle,
.passcode-bears.show-couple~.passcode-dots {
    display: none !important;
}

.passcode-bears.show-couple {
    height: 320px;
    transition: height 1.2s ease-out;
}

.passcode-bears.show-couple .passcode-couple-img {
    height: 300px;
    transition: height 1.2s ease-out;
}

.passcode-screen.success .passcode-title,
.passcode-screen.success .passcode-subtitle,
.passcode-screen.success .passcode-dots,
.passcode-screen.success .passcode-keypad,
.passcode-screen.success .passcode-cancel {
    display: none !important;
}

/* Bear positions */
.passcode-bear.left.pos-0 {
    left: 2%;
}

.passcode-bear.right.pos-0 {
    right: 2%;
}

.passcode-bear.left.pos-1 {
    left: 6%;
}

.passcode-bear.right.pos-1 {
    right: 6%;
}

.passcode-bear.left.pos-2 {
    left: 12%;
}

.passcode-bear.right.pos-2 {
    right: 12%;
}

.passcode-bear.left.pos-3 {
    left: 20%;
}

.passcode-bear.right.pos-3 {
    right: 20%;
}

.passcode-bear.left.pos-4 {
    left: 34%;
}

.passcode-bear.right.pos-4 {
    right: 34%;
}

/* ========== RESPONSIVE: FULL SCREEN TRÊN MOBILE ========== */
@media (max-width: 768px) {
    body {
        position: fixed;
        inset: 0;
        width: 100%;
        padding: 0;
        align-items: stretch;
        justify-content: stretch;
        /* Repeat fallback stack cho body trên mobile */
        height: 100vh;
        height: 100svh;
        height: 100dvh;
    }

    .container {
        max-width: none;
        width: 100%;
        /* Dùng cùng fallback stack cho container */
        height: 100vh;
        height: 100svh;
        height: 100dvh;
    }

    .phone-container {
        width: 100%;
        height: 100%;
    }

    .phone-mockup {
        width: 100%;
        height: 100%;
        max-width: none;
        border-radius: 0;
        box-shadow: none;
        border: none;
    }

    .phone-screen {
        inset: 0;
        border-radius: 0;
    }

    .dynamic-island,
    .side-btn-left,
    .side-btn-right {
        display: none;
    }

    /* Safe area cho notch iPhone (PWA / Add to Home Screen) */
    .lock-screen-content {
        padding-top: max(60px, env(safe-area-inset-top, 0px) + 20px);
    }

    .chat-header {
        padding-top: max(32px, env(safe-area-inset-top, 0px) + 8px);
    }

    .lock-notifications {
        padding-bottom: max(16px, env(safe-area-inset-bottom, 0px) + 8px);
    }

    .passcode-keypad {
        padding-bottom: max(20px, env(safe-area-inset-bottom, 0px) + 12px);
    }

    .chat-input-container {
        padding-bottom: max(16px, env(safe-area-inset-bottom, 0px) + 12px);
    }

    .phone-content {
        touch-action: pan-y;
    }

    .message-list {
        touch-action: pan-y;
    }
}

/* ========== PWA: Add to Home Screen — không có thanh Safari, full màn hình ========== */
@media (max-width: 768px) and (display-mode: standalone),
(max-width: 768px) and (display-mode: fullscreen) {
    html {
        height: 100vh !important;
        min-height: 100vh !important;
        background: #0a0a0a;
    }

    body {
        height: 100vh !important;
        min-height: 100vh !important;
        position: fixed !important;
        inset: 0 !important;
        background: linear-gradient(to bottom right, #171717, #171717, #0a0a0a);
    }

    .container {
        height: 100% !important;
        min-height: 100% !important;
    }
}

/* ========== Scene 3D (backup2) - hiện khi ấn giữ fingerprint ========== */
.scene3d-root {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    background: #000;
    overflow: hidden;
}

.scene3d-root.visible {
    display: block;
}

/* Màn vào trực tiếp (enableLockAndChat = false) */
.direct-entry-container {
    position: fixed !important;
    inset: 0 !important;
    background: linear-gradient(135deg, #1a0a14 0%, #0d0510 50%, #0a0a0f 100%);
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: flex-end !important;
    padding-bottom: 0px !important;
    transition: opacity 2.5s ease-out;
}

.direct-entry-inner {
    text-align: center;
}

.direct-entry-hint {
    color: rgba(255, 182, 193, 0.9);
    font-size: 1rem;
    margin-bottom: 24px;
}

.direct-entry-container .fingerprint-wrap {
    margin: 0 auto;
    position: relative;
    opacity: 1;
}

.direct-entry-container .fingerprint-wrap .fingerprint-img {
    animation: fingerprint-shake 0.5s ease-in-out infinite;
    animation-delay: 1s;
}

#chatContainer {
    position: relative;
    z-index: 1000;
    transition: opacity 2.5s ease-out;
}

/* iOS navigator.standalone — JS thêm class .pwa-standalone */
@media (max-width: 768px) {
    html.pwa-standalone {
        height: 100vh !important;
        min-height: 100vh !important;
        background: #0a0a0a !important;
    }

    html.pwa-standalone body {
        height: 100vh !important;
        min-height: 100vh !important;
        position: fixed !important;
        inset: 0 !important;
        background: linear-gradient(to bottom right, #171717, #171717, #0a0a0a) !important;
    }

    html.pwa-standalone .container {
        height: 100% !important;
        min-height: 100% !important;
    }
}