:root {
    --background: #EDE7E3;
    --pale-element-background: #d6e9ef; 
    --element-background: #9ec8d4;
    --border-color: #f0d3c2;
    --pale-boder-color: #f0e5de; 
    --focus-color: #CBA8A1;
    --big-font-color: #16425B;
    --font-color: #489FB5;
    --pale-shadow-color: #e1a5981c;
    --dark-shadow-color: #e1b2a87e;

}

h1 {
    color: var(--big-font-color);
    margin-top: 5svh;
}

.form {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 10svh;
    gap: 30px;
}

.time-select {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.day-select {
    margin: 10px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}


body {
    background-color: var(--background);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    /* justify-content: center; */
    align-items: center;
    flex-direction: column;
    padding: 20px;
}

.dropdown-container {
    position: relative;
    width: 40svw;
}

.label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--font-color); 
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}


.select-trigger {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    background: #ffffff;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    box-shadow: 0 4px 14px var(--pale-shadow-color);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.select-trigger:hover {
    border-color: var(--focus-color);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--dark-shadow-color);
}

.select-trigger:active {
    transform: scale(0.97); /* 押したときの沈み込み */
}

.trigger-text {
    font-size: 14px;
    font-weight: 600;
    color: #64748b;
}

/* 選択済みのときのテキスト色 */
.dropdown-container.has-value .trigger-text {
    color: var(--big-font-color);
    font-weight: 700;
}

/* 矢印アイコンの回転アニメーション */
.arrow-icon {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: var(--big-font-color);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dropdown-container.open .arrow-icon {
    transform: rotate(180deg);
}

/* --- 3. 開いた時のメニューリスト --- */
.select-options {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    background: #ffffff;
    border: 1px solid var(--pale-boder-color);
    border-radius: 14px;
    padding: 6px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    list-style: none;
    z-index: 100;

    /* 閉じた状態 */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.96);
    transform-origin: top center;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 開いた状態（フワッとバウンスして出現） */
.dropdown-container.open .select-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

/* 各選択肢 */
.option {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--big-font-color);
    cursor: pointer;
    transition: all 0.15s ease;
}

.option:hover {
    background: var(--pale-element-background);
    color: var(--font-color);
    transform: translateX(4px); /* ホバー時に右へスライド */
}

.option.selected {
    background: var(--pale-element-background);
    color: var(--font-color);
}

/* --- */

h2 {
    display: flex;
    align-items: center;
    text-align: center;
    font-weight: 800;
    color: var(--focus-color);
    letter-spacing: 0.15em;
    margin: 24px 0;
}


/* --- */


.room-input input[type="number"]::-webkit-outer-spin-button,
.room-input input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.room-input input[type="number"] {
    -moz-appearance: textfield; /* Firefox用 */
}


.room-input {
    width: 100%;
}

.room-input input {
    width: 100%;
    height: 48px; 
    padding: 0 16px;
    background: #ffffff;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    color: #0f172a;
    text-align: center; 
    letter-spacing: 0.05em;
    outline: none;
    box-shadow: 0 4px 14px var(--pale-shadow-color);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ホバー時：わずかに浮き上がる */
.room-input input:hover {
    border-color: var(--focus-color);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--dark-shadow-color);
}

/* フォーカス時 */
.room-input input:focus {
    border-color: var(--focus-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 18px var(--dark-shadow-color);
}

/* プレースホルダーの文字色 */
.room-input input::placeholder {
    color: #cec7c1;
    font-weight: 500;
    letter-spacing: 0.02em;
}


/* --- */

/* --- ボタンを跳ねさせる空間を確保 --- */
.submit-btn-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
}

/* --- 送信ボタン本体 --- */
.submit-btn {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 140px;  
    height: 48px;  
    background: #ffffff;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--font-color);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.1em;
    cursor: pointer;
    user-select: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 4px 12px var(--pale-shadow-color);

    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.2s ease,
                box-shadow 0.2s ease;
}

.submit-btn.is-loading {
    transition: none !important; 
}

.submit-btn:hover:not(.is-loading) {
    border-color: var(--focus-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--dark-shadow-color);
}

.submit-btn:active:not(.is-loading) {
    transform: scale(0.95);
    box-shadow: 0 2px 6px var(--pale-shadow-color);
}

.btn-text {
    pointer-events: none;
}

/* --- */

.error-text{
    color: red;
    font-size: 16px;
    margin-top: 4svh;
}

/* --- */



.result {
    display: grid;
    /* 1つのカードの最小幅を240pxとし、余った幅は均等に広げて自動折り返し */
    grid-template-columns: repeat(auto-fill, minmax(17svw, 1fr));
    gap: 20px; /* カード同士の隙間 */
    width: 100%;
    margin-top: 48px;
    padding-bottom: 60px;
}


.room-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 12px;
    border: 1px solid var(--border-color, #e2e8f0);
    box-shadow: 0 10px 25px -5px var(--pale-shadow-color, rgba(0,0,0,0.05));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 20svw;
    aspect-ratio: 1;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.room-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px -6px var(--dark-shadow-color, rgba(0,0,0,0.1));
}

.card-no {
    font-size: 8px;
    font-weight: 700;
    color: var(--text-muted, #94a3b8);
    align-self: flex-start;
    margin-bottom: auto; 
}

.card-room-name {
    font-size: 16px;
    font-weight: 800;
    color: var(--font-color); 
    margin: 4px 0;
    letter-spacing: 0.05em;
}

/* --- */
.app-footer {
    width: 100%;
    margin-top: auto;
    padding: 16px 20px 20px 20px; 
    background: transparent;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: center;
}

.footer-content {
    width: 100%;
    max-width: 800px;
    text-align: center;
}


.footer-note {
    font-size: 11px;
    line-height: 1.6;
    color: #94a3b8;
    font-weight: 500;
    margin-bottom: 8px;
}

/* 区切り線の余白を圧縮 */
.footer-divider {
    width: 30px;
    height: 1px;
    background: #cbd5e1;
    margin: 0 auto 10px auto; 
    opacity: 0.5;
}

/* 横並びにして高さを節約 */
.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px; 
    font-size: 11px;
    color: #94a3b8;
    flex-wrap: wrap;
}

.footer-title {
    font-weight: 800;
    letter-spacing: 0.05em;
    color: #64748b;
}


.footer-copy a,
.app-footer a {
    color: inherit;           
    text-decoration: none;  
    transition: color 0.2s ease;
}


.footer-copy a:hover,
.app-footer a:hover {
    color: var(--focus-color);
    text-decoration: underline;
}