/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ff0000;
    --secondary-color: #3498db;
    --success-color: #00ff00;
    --warning-color: #ff9500;
    --dark-bg: #0a0a0a;
    --card-bg: #1a1a1a;
    --text-primary: #ff0000;
    --text-secondary: #999999;
    --border-radius: 16px;
    --button-radius: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #000000;
    color: var(--text-primary);
    min-height: 100vh;
    min-height: -webkit-fill-available; /* iOS Safari対応 */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: env(safe-area-inset-top, 10px) env(safe-area-inset-right, 10px) env(safe-area-inset-bottom, 10px) env(safe-area-inset-left, 10px);
    overflow: hidden;
    touch-action: manipulation; /* タッチ操作を最適化 */
    margin: 0;
}

.container {
    width: 100%;
    max-width: 100vw;
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: -webkit-fill-available;
    padding: 0;
    overflow: hidden;
}

/* タイマー表示エリア */
.timer-display {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    border-radius: var(--border-radius);
    padding: clamp(8px, 1.5vh, 15px) clamp(8px, 1.5vw, 15px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 0;
    flex: 1;
    gap: clamp(6px, 1vh, 10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
}

.timer-display.active {
    border-color: rgba(255, 0, 0, 0.3);
}

.timer-display.rest {
    border-color: rgba(0, 255, 0, 0.3);
}

.timer-display.preparation {
    border-color: rgba(0, 255, 0, 0.3);
}

.timer-display.bell {
    border-color: rgba(255, 149, 0, 0.3);
}

.timer-display.finished {
    border-color: rgba(255, 204, 0, 0.3);
}

/* 点滅アニメーション */
.timer-display.blink {
    animation: blink-border 0.5s ease-in-out;
}

@keyframes blink-border {
    0%, 100% {
        border-color: rgba(255, 255, 255, 0.1);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    }
    50% {
        border-color: rgba(255, 255, 255, 0.8);
        box-shadow: 0 8px 32px rgba(255, 255, 255, 0.3), 0 0 20px rgba(255, 255, 255, 0.2);
    }
}

/* トップバー */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    padding-top: calc(env(safe-area-inset-top, 0px) + 15px);
    padding-left: calc(env(safe-area-inset-left, 0px) + 20px);
    padding-right: calc(env(safe-area-inset-right, 0px) + 20px);
}

/* ラウンド情報 */
.round-info {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.round-counter {
    font-size: clamp(0.9rem, 2.2vw, 1.2rem);
    font-weight: 700;
    color: #ffcc00;
    text-shadow: 0 0 10px rgba(255, 204, 0, 0.5);
    letter-spacing: 1px;
}

.preset-selector {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.preset-name {
    display: inline-flex;
    align-items: center;
    font-size: clamp(0.7rem, 1.6vw, 0.85rem);
    font-weight: 500;
    color: rgba(0, 255, 0, 0.8);
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
    padding: 4px 10px 4px 6px;
    border-radius: 20px;
    background: rgba(0, 255, 0, 0.08);
    border: 1px solid rgba(0, 255, 0, 0.2);
}

.preset-name::before {
    content: '📋';
    font-size: 0.9em;
    margin-right: 4px;
}

.preset-name:hover {
    color: rgba(0, 255, 0, 1);
    background: rgba(0, 255, 0, 0.15);
    border-color: rgba(0, 255, 0, 0.4);
    transform: translateY(-1px);
}

.preset-name:active {
    transform: translateY(0);
}

.preset-name:empty::before {
    content: '📋';
    margin-right: 0;
}

.preset-name:empty::after {
    content: attr(data-empty-text);
    font-size: 0.85em;
    opacity: 0.6;
    margin-left: 4px;
}

.preset-quick-select {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    width: 100%;
    height: 100%;
    font-size: clamp(0.85rem, 1.8vw, 1rem);
    background: transparent;
    border: none;
    color: transparent;
    z-index: 10;
}

.preset-quick-select:focus {
    opacity: 1;
    pointer-events: all;
    position: fixed;
    left: 20px;
    left: calc(env(safe-area-inset-left, 0px) + 20px);
    top: 60px;
    top: calc(env(safe-area-inset-top, 0px) + 60px);
    transform: none;
    background: rgba(10, 10, 10, 0.98);
    color: #ffffff;
    border: 2px solid rgba(0, 255, 0, 0.6);
    border-radius: 12px;
    padding: 8px 12px;
    width: auto;
    min-width: 200px;
    max-width: 300px;
    height: auto;
    z-index: 10000;
    box-shadow: 0 8px 32px rgba(0, 255, 0, 0.3), 0 0 0 1px rgba(0, 255, 0, 0.1);
    backdrop-filter: blur(20px);
}

.preset-quick-select option {
    background: #0a0a0a;
    color: #ffffff;
    padding: 10px;
    font-size: 1rem;
}

.preset-quick-select option:checked {
    background: rgba(0, 255, 0, 0.2);
    color: #00ff00;
}

.status-text {
    display: block;
    font-size: clamp(0.75rem, 2vw, 1rem);
    font-weight: 700;
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 1;
    color: #ffffff;
    text-shadow: none;
}

.round-counter {
    font-size: 1.5rem;
    font-weight: 700;
}

.separator {
    margin: 0 8px;
    opacity: 0.6;
}

/* 時間表示 */
.time-display {
    text-align: center;
    margin: 0;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
    overflow: hidden;
    width: 100%;
}

.time {
    font-size: clamp(4rem, 25vw, 20rem);
    font-weight: 400;
    font-variant-numeric: tabular-nums;
    font-family: 'Russo One', 'Courier New', 'Courier', monospace;
    text-shadow: 0 0 30px rgba(255, 0, 0, 0.6), 0 0 10px rgba(255, 0, 0, 0.4);
    letter-spacing: 0.05em;
    line-height: 1;
    color: #ff0000;
    max-width: 100%;
    width: 100%;
    word-break: keep-all;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: clip;
}

/* プログレスバー */
.progress-bar {
    width: 100%;
    height: clamp(8px, 1.8vh, 12px);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 100px;
    overflow: hidden;
    margin: 0;
    flex-shrink: 0;
    border: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ffffff 0%, rgba(255, 255, 255, 0.8) 100%);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 100px;
}

/* コントロールボタン */
.controls {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(4px, 1vw, 8px);
    margin-top: 0;
    flex-shrink: 0;
    width: 100%;
    max-width: 100%;
}

.language-switcher-top {
    display: inline-flex;
}

.btn-language {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px 4px 6px;
    font-size: clamp(0.7rem, 1.6vw, 0.85rem);
    font-weight: 500;
    background: rgba(0, 255, 0, 0.08);
    border: 1px solid rgba(0, 255, 0, 0.2);
    color: rgba(0, 255, 0, 0.8);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-tap-highlight-color: transparent;
    letter-spacing: 0.5px;
}

.btn-language:hover {
    color: rgba(0, 255, 0, 1);
    background: rgba(0, 255, 0, 0.15);
    border-color: rgba(0, 255, 0, 0.4);
    transform: translateY(-1px);
}

.btn-language:active {
    transform: translateY(0);
}

.btn {
    padding: clamp(8px, 1.5vh, 12px) clamp(12px, 2vw, 16px);
    font-size: clamp(0.75rem, 1.8vw, 0.95rem);
    font-weight: 600;
    border-radius: var(--button-radius);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-height: 40px;
    -webkit-tap-highlight-color: transparent;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover:not(:disabled)::before {
    width: 300px;
    height: 300px;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, #00ff00 0%, #00cc00 100%);
    color: #000000;
    font-weight: 700;
    border: none;
    box-shadow: 0 4px 16px rgba(0, 255, 0, 0.4);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 8px 24px rgba(0, 255, 0, 0.6);
}

.btn-warning {
    background: linear-gradient(135deg, rgba(255, 149, 0, 0.4) 0%, rgba(255, 149, 0, 0.2) 100%);
    color: #ff9500;
    font-weight: 700;
    border: 1px solid rgba(255, 149, 0, 0.5);
    box-shadow: 0 4px 16px rgba(255, 149, 0, 0.2);
}

.btn-warning:hover:not(:disabled) {
    background: linear-gradient(135deg, rgba(255, 149, 0, 0.5) 0%, rgba(255, 149, 0, 0.3) 100%);
    box-shadow: 0 8px 24px rgba(255, 149, 0, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.04) 100%);
    color: #aaaaaa;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover:not(:disabled) {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.06) 100%);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-settings {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn-settings:hover:not(:disabled) {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.08) 100%);
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    z-index: 100000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #ffffff;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: #ffffff;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s ease;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 30px;
}

.setting-group {
    margin-bottom: 25px;
}

.setting-group label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #ffffff;
}

.setting-description {
    display: block;
    font-size: 0.85rem;
    color: #999999;
    margin-top: 8px;
    font-weight: 400;
    line-height: 1.4;
}

.pwa-info {
    margin-top: 30px;
    padding: 20px;
    background: rgba(0, 255, 0, 0.05);
    border: 1px solid rgba(0, 255, 0, 0.2);
    border-radius: 8px;
}

.pwa-info p {
    margin: 0;
    font-size: 0.9rem;
    color: #ffffff;
    line-height: 1.6;
}

.pwa-info p:first-child {
    font-weight: 600;
    margin-bottom: 8px;
}

.pwa-instructions {
    font-size: 0.85rem;
    color: #aaaaaa;
    font-weight: 400;
}

.setting-group input[type="number"],
.setting-group input[type="text"],
.setting-group select {
    width: 100%;
    padding: 12px 15px;
    font-size: 1.1rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    caret-color: #ffffff;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.setting-group input[type="number"]:focus,
.setting-group input[type="text"]:focus,
.setting-group select:focus {
    outline: none;
    border-color: #00ff00;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(0, 255, 0, 0.1);
}

.setting-group select {
    cursor: pointer;
}

.setting-group select option {
    background: #1a1a1a;
    color: #ffffff;
}

.time-unit-group {
    display: flex;
    gap: 10px;
}

.time-unit-group input[type="number"] {
    flex: 2;
}

.time-unit-group select {
    flex: 1;
    min-width: 80px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: #ffffff;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
}

.modal-footer {
    padding: 20px 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.modal-footer .btn {
    flex: 1;
    min-width: 120px;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    body {
        padding: env(safe-area-inset-top, 5px) env(safe-area-inset-right, 5px) env(safe-area-inset-bottom, 5px) env(safe-area-inset-left, 5px);
    }

    .timer-display {
        padding: clamp(8px, 1.5vh, 15px) clamp(8px, 1.5vw, 15px);
    }

    .modal-content {
        width: 95%;
    }
}

@media (max-width: 480px) {
    .controls {
        grid-template-columns: 1fr 1fr;
    }

    .time {
        font-size: clamp(3.5rem, 22vw, 15rem);
    }
}

/* 横向きスマホ対応 */
@media (max-height: 600px) and (orientation: landscape) {
    body {
        padding: env(safe-area-inset-top, 3px) env(safe-area-inset-right, 5px) env(safe-area-inset-bottom, 3px) env(safe-area-inset-left, 5px);
    }

    .timer-display {
        padding: clamp(5px, 1vh, 10px) clamp(8px, 1.5vw, 15px);
        gap: clamp(5px, 1vh, 8px);
    }

    .time-display {
        margin: 0;
    }

    .time {
        font-size: clamp(3rem, 18vw, 12rem);
    }

    .status-text {
        font-size: clamp(0.8rem, 2vw, 1rem);
    }

    .controls {
        gap: clamp(4px, 1vw, 6px);
    }

    .btn {
        min-height: 38px;
        padding: clamp(6px, 1vh, 10px) clamp(8px, 1.5vw, 14px);
        font-size: clamp(0.75rem, 1.8vw, 0.9rem);
    }

    .progress-bar {
        height: clamp(4px, 1vh, 6px);
    }
}

/* PWA対応 */
@media (display-mode: standalone) {
    body {
        padding-top: max(env(safe-area-inset-top), 10px);
        padding-bottom: max(env(safe-area-inset-bottom), 10px);
    }
}

/* ダークモード用のスクロールバー */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}