/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --pink:        #d4a0b5;
    --pink-dim:    #b8849a;
    --text:        #e4d0d5;
    --text-dim:    #9a8890;
    --glass:       rgba(22, 16, 32, 0.55);
    --border:      rgba(212, 160, 181, 0.12);
    --border-mid:  rgba(212, 160, 181, 0.22);
}

body {
    background:
        radial-gradient(ellipse at 25% 75%, rgba(90, 45, 65, 0.35) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 25%, rgba(45, 30, 75, 0.28) 0%, transparent 55%),
        linear-gradient(155deg, #19132a 0%, #22193a 45%, #1c1830 100%);
    min-height: 100vh;
    color: var(--text);
    font-family: 'Palatino Linotype', 'Book Antiqua', 'STSong', 'SimSun', serif;
    overflow: hidden;
}

/* ===== Canvas ===== */
#canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* ===== Page Layout ===== */
.page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    gap: 3rem;
}

/* 桌面端：内容推到右侧，树在左侧画布区 */
.content-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    width: 100%;
}

/* ===== Header ===== */
.header {
    text-align: center;
    animation: fadeUp 1.8s ease-out both;
}

.title {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 300;
    letter-spacing: 0.6em;
    color: var(--pink);
    text-shadow: 0 0 40px rgba(212, 160, 181, 0.25);
    padding-right: 0.6em; /* compensate letter-spacing on last char */
    margin-bottom: 0.8rem;
}

.subtitle {
    font-size: clamp(0.8rem, 2vw, 0.95rem);
    letter-spacing: 0.35em;
    color: var(--text-dim);
    font-weight: 300;
    padding-right: 0.35em;
}

/* ===== Timer ===== */
.main {
    width: 100%;
    max-width: 680px;
    animation: fadeUp 2.2s ease-out both;
}

.timer-wrap {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1.2rem, 4vw, 3rem);
    text-align: center;
}

.timer-label {
    font-size: clamp(0.75rem, 2vw, 0.88rem);
    letter-spacing: 0.4em;
    color: var(--text-dim);
    margin-bottom: 1.8rem;
    padding-right: 0.4em;
}

.timer-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(0.6rem, 2vw, 1.2rem);
}

.unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: clamp(46px, 10vw, 72px);
}

.val {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 200;
    color: var(--pink);
    line-height: 1;
    letter-spacing: 0.02em;
    text-shadow: 0 0 25px rgba(212, 160, 181, 0.35);
    transition: color 0.15s ease;
    display: block;
    font-variant-numeric: tabular-nums;
}

.val.tick {
    color: #e8c0d0;
    text-shadow: 0 0 35px rgba(232, 192, 208, 0.55);
}

.unit-label {
    font-size: clamp(0.65rem, 1.8vw, 0.75rem);
    letter-spacing: 0.15em;
    color: var(--text-dim);
    margin-top: 0.45rem;
    padding-right: 0.15em;
}

/* ===== No Date ===== */
.no-date {
    text-align: center;
    animation: fadeUp 2s ease-out both;
}

.no-date p {
    font-size: clamp(0.85rem, 2.5vw, 1rem);
    letter-spacing: 0.3em;
    color: var(--text-dim);
    margin-bottom: 1.8rem;
    padding-right: 0.3em;
}

.ghost-btn {
    background: transparent;
    border: 1px solid var(--pink-dim);
    color: var(--pink);
    padding: 0.75rem 2.8rem;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    letter-spacing: 0.35em;
    cursor: pointer;
    border-radius: 50px;
    font-family: inherit;
    transition: background 0.3s, box-shadow 0.3s;
    padding-right: calc(2.8rem + 0.35em);
}

.ghost-btn:hover {
    background: rgba(212, 160, 181, 0.08);
    box-shadow: 0 0 22px rgba(212, 160, 181, 0.18);
}

/* ===== Settings Button ===== */
.settings-btn {
    position: fixed;
    bottom: 1.8rem;
    right: 1.8rem;
    z-index: 10;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    color: var(--text-dim);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.settings-btn:hover {
    color: var(--pink);
    border-color: var(--border-mid);
    box-shadow: 0 0 18px rgba(212, 160, 181, 0.15);
}

/* ===== Modal ===== */
.overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(8, 5, 18, 0.75);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: #1a1430;
    border: 1px solid var(--border-mid);
    border-radius: 20px;
    padding: clamp(1.8rem, 5vw, 2.8rem);
    width: 100%;
    max-width: 380px;
    text-align: center;
    transform: translateY(16px) scale(0.98);
    transition: transform 0.3s ease;
}

.overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    color: var(--pink);
    margin-bottom: 0.6rem;
    padding-right: 0.3em;
}

.modal-desc {
    font-size: 0.82rem;
    letter-spacing: 0.2em;
    color: var(--text-dim);
    margin-bottom: 2rem;
}

.date-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-mid);
    border-radius: 10px;
    color: var(--text);
    padding: 0.85rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    text-align: center;
    outline: none;
    margin-bottom: 2rem;
    transition: border-color 0.3s;
    cursor: pointer;
}

.date-input:focus {
    border-color: var(--pink-dim);
}

/* Chrome/Edge date input icon color */
::-webkit-calendar-picker-indicator {
    filter: invert(0.65) sepia(0.3) hue-rotate(300deg);
    cursor: pointer;
}

.modal-actions {
    display: flex;
    gap: 0.8rem;
    justify-content: center;
}

.btn-cancel,
.btn-confirm {
    flex: 1;
    max-width: 140px;
    padding: 0.7rem 1rem;
    border-radius: 50px;
    font-size: 0.88rem;
    letter-spacing: 0.2em;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.25s ease;
}

.btn-cancel {
    background: transparent;
    border: 1px solid rgba(154, 136, 144, 0.3);
    color: var(--text-dim);
}

.btn-cancel:hover {
    border-color: var(--text-dim);
    color: var(--text);
}

.btn-confirm {
    background: rgba(212, 160, 181, 0.1);
    border: 1px solid var(--pink-dim);
    color: var(--pink);
}

.btn-confirm:hover {
    background: rgba(212, 160, 181, 0.2);
    box-shadow: 0 0 18px rgba(212, 160, 181, 0.2);
}

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

/* ===== Animations ===== */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Responsive ===== */

/* 桌面：内容区占右侧，树在画布左侧 */
@media (min-width: 768px) {
    .page {
        align-items: flex-end;
        padding-right: 6%;
        padding-left: 0;
    }

    .content-area {
        width: 46%;
        max-width: 500px;
        align-items: flex-start;
    }

    .header {
        text-align: left;
    }

    .main {
        width: 100%;
        max-width: 500px;
    }

    .no-date {
        text-align: left;
    }
}

/* 移动端：内容在上方，留出底部空间给树 */
@media (max-width: 767px) {
    .page {
        justify-content: flex-start;
        padding-top: 14vh;
    }

    .content-area {
        align-items: center;
    }
}

@media (max-width: 420px) {
    .timer-grid {
        gap: 0.5rem;
    }
    .unit {
        min-width: 44px;
    }
}