:root {
    --primary-color: #6366f1;
    /* Indigo 500 */
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;

    --weekly-color: #10b981;
    /* Emerald 500 */
    --weekly-light: #d1fae5;
    --weekly-hover: #059669;

    --monthly-color: #3b82f6;
    /* Blue 500 */
    --monthly-light: #dbeafe;
    --monthly-hover: #2563eb;

    --holiday-color: #ef4444;
    /* Red 500 */
    --saturday-color: #3b82f6;

    --bg-color: #eef2ff;
    /* Indigo 50 */
    --card-bg: #ffffff;
    --text-main: #1e1b4b;
    /* Indigo 950 */
    --text-muted: #64748b;
    --border-color: #c7d2fe;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);

    --font-family: 'Inter', 'Noto Sans JP', sans-serif;
}

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

img,
input,
select,
textarea {
    max-width: 100%;
}

html,
body {
    overflow-x: hidden !important;
    width: 100% !important;
    position: relative;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding: 16px;
    padding-bottom: 40px;
}

.app-container {
    max-width: 600px !important;
    margin: 0 auto;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    margin-top: 10px;
    margin-bottom: 24px;
    padding: 0;
}

.app-header .header-icon img {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.divider {
    border: 0;
    height: 1px;
    background: var(--border-color);
    margin: 24px 0;
}

/* Form Elements */
.form-row {
    display: flex;
    gap: 20px;
}

@media (max-width: 480px) {
    .form-row {
        flex-direction: column;
        gap: 20px;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group.half {
    flex: 1;
}

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

label {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
}

.mb-3 {
    margin-bottom: 12px;
}

.mb-4 {
    margin-bottom: 20px;
}

/* Inputs */
.input-wrapper {
    position: relative;
    width: 100%;
}

.input-wrapper input {
    display: block;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    -webkit-appearance: none;
    appearance: none;
    padding: 12px;
    font-size: 16px !important;
    /* iOSでズームさせない最小サイズ */
    font-family: inherit;
    font-weight: 600;
    color: var(--text-main);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    outline: none;
    transition: all 0.2s ease;
    text-align: right;
    background-color: #f8fafc;
}

/* iOS Safari types specific reset */
input[type="date"]::-webkit-inner-spin-button,
input[type="date"]::-webkit-calendar-picker-indicator {
    margin-right: -4px;
}

.input-wrapper.input-large input {
    font-size: 1.8rem;
    padding: 16px;
    font-weight: 800;
    color: var(--primary-color);
}

.input-wrapper input:focus {
    border-color: var(--primary-color);
    background-color: #ffffff;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.date-input {
    text-align: left !important;
}

/* Stepper */
.input-stepper {
    display: flex;
    align-items: stretch;
    width: 100%;
}

.stepper-btn {
    flex: 0 0 46px;
    background-color: #ffffff;
    border: 2px solid var(--border-color);
    color: var(--primary-color);
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.15s ease;
}

.stepper-btn:first-child {
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    border-right: none;
}

.stepper-btn:last-child {
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    border-left: none;
}

.stepper-btn:active {
    background-color: var(--primary-light);
}

.stepper-input input {
    border-radius: 0;
    text-align: center;
}

/* Clear Button */
.clear-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 4px 8px;
    cursor: pointer;
    border-radius: 4px;
    transition: color 0.2s;
}

.clear-btn:hover {
    color: var(--text-main);
    background: #f1f5f9;
}

/* Quick Buttons (Grid) */
.section-subtitle {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 12px;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 4px;
}

.section-sub.footer-text {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
}

/* Back Button */
.back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    text-decoration: none;
    font-size: 1.3rem;
    margin-right: 8px;
    flex-shrink: 0;
    transition: transform 0.2s;
    box-shadow: var(--shadow-sm);
}

.back-btn:active {
    transform: scale(0.95);
    background: #f1f5f9;
}

.quick-buttons-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-group-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}

.btn-group-row.last-row {
    grid-template-columns: repeat(2, 60px);
}

/* 91, 98は幅固定で左寄せ */

.qbtn {
    padding: 12px 0;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    border: 2px solid transparent;
}

.qbtn:active {
    transform: scale(0.95);
}

/* Weekly variants (緑系) */
.qbtn-weekly {
    background-color: var(--weekly-light);
    color: var(--weekly-hover);
    border-color: #a7f3d0;
}

.qbtn-weekly.active-btn {
    background-color: var(--weekly-color);
    color: white;
    border-color: var(--weekly-hover);
}

/* Monthly variants (青系) */
.qbtn-monthly {
    background-color: var(--monthly-light);
    color: var(--monthly-hover);
    border-color: #bfdbfe;
}

.qbtn-monthly.active-btn {
    background-color: var(--monthly-color);
    color: white;
    border-color: var(--monthly-hover);
}


/* =========================================
   Results & Drum Roll UI
   ========================================= */
.results-card {
    border: 2px solid var(--primary-color);
    background-color: #ffffff;
    padding: 0;
    overflow: hidden;
}

.results-header {
    background-color: var(--primary-light);
    padding: 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-size: 1.2rem;
    color: var(--primary-hover);
    font-weight: 800;
    line-height: 1.3;
}

.results-header h2 small {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
}

.drum-roll-container {
    display: flex;
    flex-direction: column;
    padding: 20px 16px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 30%, #ffffff 70%, #f8fafc 100%);
}

.drum-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-radius: 8px;
    transition: all 0.3s;
    margin: 4px 0;
}

.drum-item .drum-offset {
    font-size: 0.9rem;
    font-weight: 700;
    color: #94a3b8;
    width: 45px;
}

.drum-item .drum-date {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.drum-item .drum-holiday {
    font-size: 0.8rem;
    font-weight: 700;
    min-width: 60px;
    text-align: right;
}

/* ± 日（小さく薄く表示） */
.prev-day,
.next-day {
    opacity: 0.7;
    transform: scale(0.95);
}

.prev-day:first-child,
.next-day:last-child {
    opacity: 0.4;
    transform: scale(0.9);
}

/* 当日（大きく強調表示） */
.target-day {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.05);
    opacity: 1;
    box-shadow: var(--shadow-md);
    margin: 12px 0;
    padding: 18px 20px;
    z-index: 10;
}

.target-day .drum-offset {
    color: #c7d2fe;
    font-size: 1rem;
}

.target-day .drum-date {
    color: white;
    font-size: 1.45rem;
    font-weight: 800;
}

.target-day .drum-holiday {
    color: #c7d2fe;
}

/* 祝日・休日の色分け */
.is-holiday .drum-date,
.is-sunday .drum-date {
    color: var(--holiday-color);
}

.is-saturday .drum-date {
    color: var(--saturday-color);
}

.target-day.is-holiday {
    background-color: var(--holiday-color);
}

.target-day.is-sunday {
    background-color: var(--holiday-color);
}

.target-day.is-saturday {
    background-color: var(--saturday-color);
}

.target-day.is-holiday .drum-date,
.target-day.is-sunday .drum-date,
.target-day.is-saturday .drum-date {
    color: white;
}

.target-day.is-holiday .drum-holiday {
    color: #fecdd3;
    font-size: 0.9rem;
}

/* Footer API status */
.results-footer {
    padding: 12px;
    text-align: right;
    border-top: 1px dashed var(--border-color);
    background-color: #f8fafc;
}

.api-msg {
    font-size: 0.75rem;
    color: #94a3b8;
}

/* Responsive adjustments for smaller iPhones */
@media (max-width: 375px) {
    body {
        padding: 8px;
    }

    .card {
        padding: 12px 10px;
        overflow: hidden;
    }

    .app-header {
        gap: 8px;
        margin-bottom: 20px;
    }

    .app-header h1 {
        font-size: 1.1rem;
    }

    .app-header .header-icon img {
        width: 34px;
        height: 34px;
    }

    .back-btn {
        width: 38px;
        height: 38px;
        margin-right: 4px;
    }

    .form-group label {
        font-size: 0.85rem;
    }

    .input-wrapper input {
        font-size: 0.95rem;
        padding: 8px;
    }

    .input-wrapper.input-large input {
        font-size: 1.3rem;
        padding: 10px;
    }

    .stepper-btn {
        flex: 0 0 34px;
        font-size: 0.9rem;
    }

    .drum-item {
        padding: 6px 8px;
    }

    .drum-item .drum-offset {
        width: 32px;
        font-size: 0.75rem;
    }

    .drum-item .drum-date {
        font-size: 0.85rem;
    }

    .drum-item .drum-holiday {
        min-width: 40px;
        font-size: 0.7rem;
    }

    .target-day {
        padding: 10px 8px;
        margin: 8px 0;
    }

    .target-day .drum-date {
        font-size: 0.95rem;
    }

    .btn-group-row {
        gap: 4px;
    }

    .qbtn {
        font-size: 0.85rem;
        padding: 10px 0;
    }
}