:root {
    /* Cyberpunk Color Palette */
    --cyber-cyan: #00f3ff;
    --cyber-magenta: #ff00ff;
    --cyber-purple: #9d00ff;
    --cyber-pink: #ff006e;
    --cyber-yellow: #ffea00;
    --cyber-green: #00ff9f;

    /* Background Colors */
    --bg-primary: #0a0e27;
    --bg-secondary: #151932;
    --bg-tertiary: #1e2340;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #6b7a99;

    /* Fonts */
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;

    /* Shadows & Glows */
    --glow-cyan: 0 0 20px rgba(0, 243, 255, 0.5);
    --glow-magenta: 0 0 20px rgba(255, 0, 255, 0.5);
    --glow-purple: 0 0 20px rgba(157, 0, 255, 0.5);
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Effects */
.cyber-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.glow-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
    animation: float 20s ease-in-out infinite;
}

.glow-orb-1 {
    width: 400px;
    height: 400px;
    background: var(--cyber-cyan);
    top: -200px;
    right: -200px;
}

.glow-orb-2 {
    width: 300px;
    height: 300px;
    background: var(--cyber-magenta);
    bottom: -150px;
    left: -150px;
    animation-delay: -5s;
}

.glow-orb-3 {
    width: 250px;
    height: 250px;
    background: var(--cyber-purple);
    top: 50%;
    left: 50%;
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* Container */
.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    background: linear-gradient(135deg, var(--cyber-cyan), var(--cyber-magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    position: relative;
}

.glitch {
    position: relative;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    -webkit-background-clip: text;
    background-clip: text;
}

.glitch::before {
    animation: glitch-1 2s infinite;
    clip-path: polygon(0 0, 100% 0, 100% 45%, 0 45%);
    transform: translate(-0.025em, -0.0125em);
}

.glitch::after {
    animation: glitch-2 2s infinite;
    clip-path: polygon(0 55%, 100% 55%, 100% 100%, 0 100%);
    transform: translate(0.025em, 0.0125em);
}

@keyframes glitch-1 {

    0%,
    100% {
        transform: translate(0);
    }

    20% {
        transform: translate(-2px, 2px);
    }

    40% {
        transform: translate(-2px, -2px);
    }

    60% {
        transform: translate(2px, 2px);
    }

    80% {
        transform: translate(2px, -2px);
    }
}

@keyframes glitch-2 {

    0%,
    100% {
        transform: translate(0);
    }

    20% {
        transform: translate(2px, -2px);
    }

    40% {
        transform: translate(2px, 2px);
    }

    60% {
        transform: translate(-2px, -2px);
    }

    80% {
        transform: translate(-2px, 2px);
    }
}

.status-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--cyber-green);
    letter-spacing: 0.1em;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--cyber-green);
    border-radius: 50%;
    box-shadow: var(--glow-cyan);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Timer Section */
.timer-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.timer-container {
    position: relative;
}

.timer-ring {
    position: relative;
    width: 320px;
    height: 320px;
}

.timer-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.timer-circle-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.timer-circle-progress {
    fill: none;
    stroke: url(#gradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear;
    filter: drop-shadow(var(--glow-cyan));
}

.timer-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.timer-time {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--cyber-cyan), var(--cyber-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.timer-label {
    font-family: var(--font-display);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
}

/* Break Mode Styles */
.timer-container.break-mode .timer-circle-progress {
    stroke: url(#breakGradient);
    filter: drop-shadow(0 0 20px rgba(255, 153, 0, 0.5));
}

.timer-container.break-mode .timer-time {
    background: linear-gradient(135deg, #ff9900, #00ff9f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.timer-container.break-mode .timer-label::after {
    content: ' - 休憩中';
    color: #ff9900;
}

/* Controls */
.controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    padding: 1rem 2rem;
    border: 2px solid;
    border-radius: 0.5rem;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    border-color: var(--cyber-cyan);
    color: var(--cyber-cyan);
}

.btn-primary:hover:not(:disabled) {
    background: var(--cyber-cyan);
    color: var(--bg-primary);
    box-shadow: var(--glow-cyan);
}

.btn-secondary {
    border-color: var(--cyber-purple);
    color: var(--cyber-purple);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--cyber-purple);
    color: var(--bg-primary);
    box-shadow: var(--glow-purple);
}

.btn-danger {
    border-color: var(--cyber-pink);
    color: var(--cyber-pink);
}

.btn-danger:hover:not(:disabled) {
    background: var(--cyber-pink);
    color: var(--bg-primary);
    box-shadow: 0 0 20px rgba(255, 0, 110, 0.5);
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.2rem;
}

/* Session Info */
.session-info {
    display: flex;
    justify-content: center;
    gap: 1rem;
    width: 100%;
    max-width: 500px;
    margin-top: 2rem;
}

.info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-width: 200px;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--cyber-cyan), var(--cyber-magenta));
}

.info-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.info-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--cyber-cyan);
}

/* History Section */
.history-section {
    margin-top: 4rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.title-icon {
    color: var(--cyber-magenta);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.history-item {
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-left: 3px solid var(--cyber-cyan);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.history-item:hover {
    border-left-color: var(--cyber-magenta);
    transform: translateX(5px);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.history-time {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--cyber-cyan);
}

.history-task {
    color: var(--text-primary);
    line-height: 1.6;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 2px solid var(--cyber-cyan);
    border-radius: 1rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--glow-cyan), 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 2rem;
    border-bottom: 1px solid var(--bg-tertiary);
    position: relative;
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.modal-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--cyber-pink);
}

.modal-body {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.form-input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-primary);
    border: 2px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.3s ease;
    resize: vertical;
}

.form-input:focus {
    outline: none;
    border-color: var(--cyber-cyan);
    box-shadow: var(--glow-cyan);
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Settings Button */
.settings-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--cyber-purple);
    color: var(--cyber-purple);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 100;
}

.settings-btn:hover {
    background: var(--cyber-purple);
    color: var(--bg-primary);
    box-shadow: var(--glow-purple);
    transform: rotate(90deg);
}

/* Settings Modal */
.settings-info {
    background: var(--bg-primary);
    border-left: 3px solid var(--cyber-cyan);
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 0.5rem;
}

.settings-info p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.settings-info code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    color: var(--cyber-cyan);
    font-family: monospace;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: 0.5rem;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.status-warning {
    background: var(--cyber-yellow);
    box-shadow: 0 0 10px rgba(255, 234, 0, 0.5);
}

.status-success {
    background: var(--cyber-green);
    box-shadow: 0 0 10px rgba(0, 255, 159, 0.5);
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        font-size: 2rem;
    }

    .timer-ring {
        width: 280px;
        height: 280px;
    }

    .timer-time {
        font-size: 3rem;
    }

    .controls {
        width: 100%;
    }

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

    .settings-btn {
        bottom: 1rem;
        right: 1rem;
        width: 50px;
        height: 50px;
    }
}

/* SVG Gradient Definition */
svg defs {
    display: none;
}

/* Flash Effect Animation */
@keyframes flashEffect {

    0%,
    100% {
        opacity: 0;
    }

    50% {
        opacity: 1;
    }
}