/**
 * 経過観察アンケートアプリ スタイルシート
 * 高齢者向け：落ち着いた配色、安心感のあるデザイン
 */

/* ===== CSS変数 ===== */
:root {
    --color-bg: #F5F7FA;
    --color-bg-chat: #E3EBF3;
    --color-text: #2C3E50;
    --color-text-secondary: #5D6D7E;
    --color-text-light: #8899A6;

    --color-primary: #3B7CB8;
    --color-primary-light: #E8F1F8;
    --color-primary-dark: #2C5F8A;

    --color-answer: #3B7CB8;
    --color-answer-text: #FFFFFF;
    --color-confirm: #4A8FBA;

    --color-white: #FFFFFF;
    --color-border: #C8D4E0;
    --color-error: #C54B4B;

    --font-size-h1: 26px;
    --font-size-body: 20px;
    --font-size-button: 19px;
    --font-size-small: 15px;
    --font-size-vas: 44px;

    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;

    --btn-min-height: 54px;
    --border-radius: 12px;
    --border-radius-large: 20px;
}

/* ===== リセット & ベース ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; overflow: hidden; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN',
                 'Hiragino Sans', Meiryo, sans-serif;
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* ===== 画面切り替え ===== */
.screen { display: none; height: 100%; }
.screen.active { display: flex; flex-direction: column; }

/* 中央寄せ画面(読み込み中 / 回答不可) */
#screen-loading, #screen-blocked { justify-content: center; align-items: center; }
.center-box {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: var(--spacing-md); padding: var(--spacing-lg); text-align: center; max-width: 480px; width: 100%;
}
.center-box .btn-large { width: auto; min-width: 240px; }

.spinner {
    width: 48px; height: 48px;
    border: 5px solid var(--color-primary-light);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 共通テキスト ===== */
h1 {
    font-size: var(--font-size-h1);
    font-weight: bold;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.description {
    font-size: var(--font-size-body);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* ===== ボタン共通 ===== */
button {
    font-family: inherit;
    font-size: var(--font-size-button);
    font-weight: 600;
    cursor: pointer;
    border: none;
    border-radius: var(--border-radius);
    transition: all 0.15s ease;
    min-height: var(--btn-min-height);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}
button:active { transform: scale(0.98); }

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(59, 124, 184, 0.3);
}
.btn-primary:hover { background-color: var(--color-primary-dark); }

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-primary); background-color: var(--color-primary-light); }

.btn-large { min-height: 76px; font-size: 21px; border-radius: var(--border-radius-large); }

/* ===== チャット画面 ===== */
#screen-chat { background-color: var(--color-bg-chat); }

.chat-header {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    flex-shrink: 0;
}
.header-top { display: flex; justify-content: space-between; align-items: center; }
#chat-progress { font-size: var(--font-size-body); font-weight: 600; }

.btn-show-consent {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    padding: 4px 12px;
    font-size: var(--font-size-small);
    font-weight: normal;
    min-height: auto;
    width: auto;
}
.btn-show-consent:hover { background-color: rgba(255, 255, 255, 0.3); }
.btn-show-consent:active { transform: scale(0.98); }

.chat-header .progress-bar {
    height: 6px;
    background-color: rgba(255,255,255,0.3);
    border-radius: 3px;
    margin-top: var(--spacing-xs);
    overflow: hidden;
}
#progress-fill { height: 100%; background-color: white; transition: width 0.3s ease; border-radius: 3px; }

.chat-container { flex: 1; overflow-y: auto; padding: var(--spacing-md); scroll-behavior: smooth; }

.chat-message { margin-bottom: var(--spacing-lg); animation: slideIn 0.3s ease; }
@keyframes slideIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 質問バブル(左側) */
.question-bubble {
    background-color: var(--color-white);
    border-radius: 4px var(--border-radius-large) var(--border-radius-large) var(--border-radius-large);
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 88%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.answer-area { margin-top: var(--spacing-sm); padding-left: var(--spacing-xs); }

.options-list { display: flex; flex-direction: column; gap: var(--spacing-xs); }

.option-btn {
    background-color: var(--color-white);
    color: var(--color-text);
    border: 2px solid var(--color-border);
    border-radius: 28px;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 52px;
    font-size: var(--font-size-body);
    font-weight: normal;
    text-align: left;
    flex-direction: row;
    justify-content: flex-start;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.option-btn:hover { border-color: var(--color-primary); background-color: var(--color-primary-light); }
.option-btn.selected { background-color: var(--color-answer); color: var(--color-answer-text); border-color: var(--color-answer); }
.option-btn.selected-previous { background-color: var(--color-primary-light); color: var(--color-primary); border-color: var(--color-primary); }
.option-btn.selecting { background-color: var(--color-primary); color: white; border-color: var(--color-primary); transform: scale(0.98); }

.answer-area.fading-out { opacity: 0; transition: opacity 0.2s ease; }
.answer-area.fading-in { animation: fadeInAnswer 0.2s ease; }
@keyframes fadeInAnswer {
    from { opacity: 0; transform: translateX(10px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 回答済みバブル(右側) */
.answer-bubble {
    background-color: var(--color-answer);
    color: var(--color-answer-text);
    border-radius: var(--border-radius-large) 4px var(--border-radius-large) var(--border-radius-large);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-left: auto;
    max-width: 85%;
    box-shadow: 0 2px 8px rgba(59, 124, 184, 0.25);
    font-size: var(--font-size-body);
    cursor: pointer;
    transition: opacity 0.2s;
}
.answer-bubble:hover { opacity: 0.9; }
.answer-bubble .edit-hint { font-size: var(--font-size-small); opacity: 0.8; margin-top: 4px; }

/* VASスライダー */
.vas-area {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid var(--color-border);
}
.vas-value-display { text-align: center; margin-bottom: var(--spacing-md); }
.vas-value-input {
    font-size: var(--font-size-vas);
    font-weight: bold;
    color: var(--color-primary);
    width: 180px;
    text-align: center;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    background-color: var(--color-white);
    -moz-appearance: textfield;
}
.vas-value-input::placeholder { color: var(--color-text-light); font-size: 24px; }
.vas-value-input::-webkit-outer-spin-button,
.vas-value-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.vas-value-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light); }

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 16px;
    border-radius: 8px;
    background: linear-gradient(to right, var(--color-primary-light) 0%, var(--color-primary) 100%);
    outline: none;
    margin: var(--spacing-md) 0;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--color-primary); border: 4px solid white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25); cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--color-primary); border: 4px solid white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25); cursor: pointer;
}
.vas-scale-numbers {
    display: flex; justify-content: space-between;
    font-size: var(--font-size-body); font-weight: bold; color: var(--color-text); margin-top: var(--spacing-xs);
}
.vas-labels { margin-top: var(--spacing-sm); font-size: var(--font-size-small); color: var(--color-text-secondary); line-height: 1.4; }
.vas-labels div { margin-bottom: 4px; }
.vas-confirm-btn { margin-top: var(--spacing-md); background-color: var(--color-primary); color: white; border-radius: 28px; }
.vas-confirm-btn:disabled { background-color: var(--color-border); cursor: not-allowed; }

/* テキスト入力 */
.text-input-area {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid var(--color-border);
}
.text-input {
    width: 100%;
    font-family: inherit;
    font-size: var(--font-size-body);
    padding: var(--spacing-sm);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    resize: none;
    min-height: 100px;
}
.text-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light); }
.text-confirm-btn { margin-top: var(--spacing-sm); background-color: var(--color-primary); color: white; border-radius: 28px; }

.input-error { color: var(--color-error); font-size: var(--font-size-small); margin-top: var(--spacing-xs); text-align: center; }

/* 確定エリア */
.confirm-area { padding: var(--spacing-md); background-color: var(--color-white); border-top: 1px solid var(--color-border); }
.btn-confirm {
    background-color: var(--color-confirm);
    color: white;
    font-size: 22px;
    min-height: 60px;
    border-radius: 30px;
    box-shadow: 0 2px 8px rgba(74, 143, 186, 0.3);
}
.btn-confirm:hover { background-color: #3A7BA5; }

/* ===== 結果画面 ===== */
#screen-result {
    justify-content: center;
    align-items: center;
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg) 100%);
}
.result-container { width: 100%; max-width: 480px; padding: var(--spacing-lg); text-align: center; }
.result-text {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    white-space: pre-line;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

/* ===== モーダル ===== */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(255, 255, 255, 0.85);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000; animation: fadeIn 0.2s ease;
}
.modal-overlay[hidden] { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-content {
    background-color: var(--color-white);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    max-width: 420px; width: 92%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    text-align: center;
}
.modal-message { font-size: var(--font-size-body); color: var(--color-text); margin-bottom: var(--spacing-lg); line-height: 1.7; }
.modal-buttons { display: flex; gap: var(--spacing-sm); }
.modal-buttons button { flex: 1; min-height: 52px; border-radius: 26px; }

/* 説明・同意文書 閲覧モーダル */
.consent-modal-content { max-width: 480px; width: 94%; max-height: 85vh; display: flex; flex-direction: column; }
.consent-scroll-area {
    max-height: 55vh; overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    background-color: var(--color-bg);
    text-align: left;
}
.consent-text { font-size: var(--font-size-body); color: var(--color-text); line-height: 1.7; margin-bottom: var(--spacing-md); }

/* 送信ボタン */
.btn-submit { margin-bottom: var(--spacing-md); }
.btn-submit.submitted { background-color: var(--color-border); color: var(--color-text-secondary); box-shadow: none; cursor: default; }
.btn-submit.submitted:hover { background-color: var(--color-border); }
.btn-submit.submitted:active { transform: none; }

/* ===== レスポンシブ対応 ===== */
@media (max-width: 480px) {
    :root { --font-size-body: 18px; --font-size-button: 17px; --font-size-vas: 38px; }
    .question-bubble { max-width: 92%; }
    .answer-bubble { max-width: 80%; }
}
@media (min-width: 768px) {
    .chat-container { max-width: 580px; margin: 0 auto; }
}

/* ===== アクセシビリティ ===== */
@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    .chat-container { scroll-behavior: auto; }
}