/* ==========================================================================
   デザイントークン
   ========================================================================== */

:root {
    /* カラー */
    --primary: #4f46e5;
    --primary-light: #eef2ff;
    --primary-lighter: #e0e7ff;
    --primary-border: #c7d2fe;
    --text-main: #1f2937;
    --text-strong: #111827;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --bg-body: #f9fafb;
    --bg-card: #ffffff;
    --border-color: #e5e7eb;
    --success-text: #15803d;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --danger-text: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --danger-hover: #fee2e2;
    --accent-green: #16a34a;
    --accent-blue: #0284c7;

    /* タイポグラフィ・形状 */
    --font-family: 'Noto Sans JP', sans-serif;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* ==========================================================================
   ベース
   ========================================================================== */

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

ul {
    list-style: none;
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

textarea::-webkit-scrollbar { width: 8px; }
textarea::-webkit-scrollbar-track { background: #f1f1f1; border-radius: var(--border-radius-sm); }
textarea::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: var(--border-radius-sm); }
textarea::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ==========================================================================
   レイアウト
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 16px;
}

.main {
    flex-grow: 1;
    padding: 32px 0;
}

.grid-layout {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

@media (min-width: 768px) {
    .grid-layout { flex-direction: row; }
    .grid-left { flex: 2; }
    .grid-right { flex: 1; }
}

/* ==========================================================================
   ヘッダー / フッター
   ========================================================================== */

.header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.footer {
    background-color: var(--text-main);
    color: var(--text-light);
    text-align: center;
    padding: 24px 0;
    font-size: 0.875rem;
    margin-top: auto;
}

/* ==========================================================================
   共通パーツ
   ========================================================================== */

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
}

.alert {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    background-color: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    font-size: 0.875rem;
}

.alert-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.btn {
    padding: 4px 12px;
    font-size: 0.875rem;
    font-family: inherit;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.btn-copy {
    color: var(--primary);
    background-color: var(--primary-light);
    border: 1px solid var(--primary-border);
}

.btn-copy:hover { background-color: var(--primary-lighter); }

.btn-copy.is-copied {
    color: var(--bg-card);
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-clear {
    color: var(--danger-text);
    background-color: var(--danger-bg);
    border: 1px solid var(--danger-border);
}

.btn-clear:hover { background-color: var(--danger-hover); }

.btn-reset {
    align-self: flex-start;
    color: var(--text-muted);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
}

.btn-reset:hover { background-color: var(--bg-body); }

.note-text {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 8px;
}

/* ==========================================================================
   入力エリア
   ========================================================================== */

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background-color: var(--bg-body);
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.toolbar-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.toolbar-actions {
    display: flex;
    gap: 8px;
}

.textarea-input {
    width: 100%;
    height: 450px;
    padding: 16px;
    border: none;
    outline: none;
    resize: none;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-main);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.textarea-input:focus {
    box-shadow: inset 0 0 0 2px var(--primary);
}

/* ==========================================================================
   結果表示エリア
   ========================================================================== */

.result-card {
    padding: 20px;
    position: sticky;
    top: 24px;
}

.result-section-title {
    font-size: 1.125rem;
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin: 32px 0 16px;
}

.result-section-title:first-child { margin-top: 0; }

.result-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.result-item.divider {
    padding-top: 12px;
    border-top: 1px solid var(--bg-body);
}

.result-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.result-label-sub {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
}

.result-value-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 4px;
}

.result-value--dark { color: var(--text-strong); }
.result-value--primary { color: var(--primary); }
.result-value--green { color: var(--accent-green); font-size: 1.5rem; }
.result-value--blue { color: var(--accent-blue); font-size: 1.5rem; }

.settings {
    margin-top: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-body);
}

.settings-summary {
    padding: 8px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    list-style-position: inside;
}

.settings-summary:hover { color: var(--primary); }

.settings-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 0 12px 12px;
}

.settings-note { margin-top: 0; }

.settings-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.settings-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    line-height: 1.4;
}

.settings-label-sub {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-light);
}

.settings-input {
    width: 100%;
    padding: 8px;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    resize: vertical;
    word-break: break-all;
}

.settings-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.time-box {
    display: flex;
    align-items: center;
    font-weight: 500;
    color: var(--text-main);
}

.time-box-icon {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    color: var(--text-light);
}

/* ==========================================================================
   広告
   ========================================================================== */

.ad-area {
    margin-top: 32px;
    min-height: 100px;
}

.ad-area .adsbygoogle { width: 100%; }