/* ===== Gate (口令门) ===== */
.gate {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    gap: 24px;
    padding: 24px;
    text-align: center;
}

.gate-logo {
    width: 180px;
    image-rendering: pixelated;
}

.gate h2 {
    font-size: var(--fs-md);
    color: var(--color-sunflower-dark);
}

.gate-input-row {
    display: flex;
    gap: 12px;
    align-items: center;
}

.gate-input-row input {
    font-family: var(--font-main);
    font-size: var(--fs-sm);
    padding: 8px 12px;
    border: 2px solid var(--color-dark);
    background: #fff;
    outline: none;
    width: 200px;
}

.gate-input-row input:focus {
    border-color: var(--color-sunflower);
}

.gate-input-row button {
    font-family: var(--font-main);
    font-size: var(--fs-sm);
    padding: 8px 16px;
    border: 2px solid var(--color-dark);
    background: var(--color-sunflower);
    color: #fff;
    cursor: pointer;
}

.gate-input-row button:active {
    transform: scale(0.95);
}

/* ===== Dialogue (对话序列) ===== */
.dialogue {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    min-height: 100vh;
    padding: 0;
    position: relative;
    overflow: hidden;
    background: var(--color-bg);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.dialogue-character {
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    max-width: 50vw;
    image-rendering: pixelated;
    transition: opacity 0.25s;
}

.dialogue-box {
    width: 100%;
    background: rgba(0, 0, 0, 0.85);
    padding: 24px 20px;
    min-height: 120px;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 10;
}

.dialogue-box-text {
    font-size: var(--fs-md);
    color: #fff;
    line-height: 1.8;
    transition: opacity 0.25s;
}

.dialogue-cursor {
    display: inline-block;
    margin-left: 4px;
    animation: cursor-blink 0.8s infinite;
    color: var(--color-sunflower);
}

@keyframes cursor-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.dialogue-hint {
    position: absolute;
    bottom: 8px;
    right: 16px;
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.4);
}

/* ===== Sign Form ===== */
.sign-form {
    display: none;
    max-width: 500px;
    margin: 0 auto;
    padding: 24px 16px;
}

.form-title {
    font-size: var(--fs-md);
    color: var(--color-sunflower-dark);
    text-align: center;
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: var(--fs-sm);
    margin-top: 16px;
    margin-bottom: 6px;
    color: var(--color-dark);
}

.required {
    color: var(--color-blush);
}

.form-input {
    font-family: var(--font-main);
    font-size: var(--fs-sm);
    width: 100%;
    padding: 8px 12px;
    border: 2px solid var(--color-dark);
    background: #fff;
    outline: none;
}

.form-input:focus {
    border-color: var(--color-sunflower);
}

/* ===== Message tabs ===== */
.message-tabs {
    display: flex;
    gap: 0;
    margin-top: 4px;
    margin-bottom: 8px;
}

.msg-tab {
    font-family: var(--font-main);
    font-size: var(--fs-sm);
    padding: 6px 16px;
    border: 2px solid var(--color-dark);
    background: #fff;
    cursor: pointer;
    flex: 1;
    text-align: center;
}

.msg-tab + .msg-tab {
    border-left: none;
}

.msg-tab.active {
    background: var(--color-sunflower);
    color: #fff;
}

.msg-panel {
    margin-bottom: 4px;
}

.voice-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.voice-btn {
    min-width: 100px;
}

.voice-btn.recording {
    background: var(--color-blush);
    color: #fff;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.voice-status {
    font-size: var(--fs-sm);
    color: var(--color-green);
}

.canvas-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.canvas-toolbar .form-label {
    margin: 0;
}

.canvas-toolbar input[type="color"] {
    width: 36px;
    height: 28px;
    border: 2px solid var(--color-dark);
    padding: 0;
    cursor: pointer;
    background: none;
}

.tool-btn {
    font-family: var(--font-main);
    font-size: var(--fs-sm);
    padding: 4px 12px;
    border: 2px solid var(--color-dark);
    background: #fff;
    cursor: pointer;
}

.tool-btn:active {
    transform: scale(0.95);
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    border: 2px solid var(--color-dark);
    background: #fff;
}

.sig-canvas {
    display: block;
    width: 100%;
    height: 60vw;
    max-height: 300px;
    touch-action: none;
    cursor: crosshair;
}

.canvas-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--fs-md);
    color: rgba(0, 0, 0, 0.1);
    pointer-events: none;
}

.submit-row {
    display: flex;
    justify-content: center;
    margin-top: 24px;
    margin-bottom: 40px;
}

.submit-img-btn {
    width: 160px;
    cursor: pointer;
    image-rendering: pixelated;
    transition: transform 0.1s;
}

.submit-img-btn:active {
    transform: scale(0.93);
}

/* ===== Confirm Modal ===== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show {
    display: flex;
}

.modal-box {
    background: #fff;
    border: 3px solid var(--color-dark);
    padding: 24px;
    max-width: 320px;
    text-align: center;
    animation: modalIn 0.3s ease;
}

.modal-text {
    font-size: var(--fs-sm);
    line-height: 2;
    margin-bottom: 20px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.modal-btn {
    font-family: var(--font-main);
    font-size: var(--fs-sm);
    padding: 8px 20px;
    border: 2px solid var(--color-dark);
    cursor: pointer;
}

.modal-btn-confirm {
    background: var(--color-sunflower);
    color: #fff;
}

.modal-btn-cancel {
    background: #fff;
    color: var(--color-dark);
}

.modal-btn:active {
    transform: scale(0.95);
}

@keyframes modalIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ===== Success Screen ===== */
.success-screen {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    gap: 12px;
}

.success-text {
    font-size: var(--fs-lg);
    color: var(--color-sunflower-dark);
}

.success-sub {
    font-size: var(--fs-sm);
    color: var(--color-green);
}

/* ===== Animations ===== */
.fade-out {
    animation: fadeOut 0.4s forwards;
}

.fade-in {
    animation: fadeIn 0.4s forwards;
}

.text-fade-out {
    opacity: 0;
    transition: opacity 0.2s;
}

.text-fade-in {
    opacity: 1;
    transition: opacity 0.25s;
}

.img-fade-out {
    opacity: 0;
    transition: opacity 0.2s;
}

.img-fade-in {
    opacity: 1;
    transition: opacity 0.25s;
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-6px); }
    80% { transform: translateX(6px); }
}

.shake {
    animation: shake 0.4s;
}