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

:root {
    --color-bg: #fae6cd;
    --color-text: #2d2d2d;
    --color-text-light: #6b6b6b;
    --color-accent: #8b7355;
    --color-card: #ffffff;
    --color-border: #e8e5e0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    padding: 20px 0 10px;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.logo-text {
    font-family: 'Lora', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* Main Content - Two Column Layout */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 60px 30px;
    flex: 1;
}

.content-wrapper {
    display: flex;
    gap: 80px;
    align-items: stretch;
    justify-content: space-between;
}

/* Left Column - Hero */
.hero-column {
    flex: 1 1 0;
    min-width: 0;
    padding-top: 20px;
    padding-left: 0;
}

.hero-title {
    font-family: 'Lora', serif;
    font-size: 3rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Right Column - Check-in */
.checkin-column {
    flex: 1 1 0;
    min-width: 0;
    width: 100%;
}

.container {
    background: var(--color-card);
    border-radius: 16px;
    padding: 36px 32px;
    border: 1px solid var(--color-border);
    width: 100%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.view {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    text-align: center;
}

.view.active {
    display: flex;
}

.section-title {
    font-family: 'Lora', serif;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.section-description {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.instructions {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
    max-width: 500px;
    line-height: 1.6;
}

.mode-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 400px;
}

.mode-btn,
.action-btn,
.signup-btn {
    background: var(--color-text);
    color: #fff;
    border: none;
    padding: 14px 32px;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    width: 100%;
    max-width: 420px;
    margin: 10px auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.mode-btn:hover,
.action-btn:hover,
.signup-btn:hover {
    background: var(--color-accent);
    transform: translateY(-1px);
}

.mode-btn:active,
.action-btn:active,
.signup-btn:active {
    transform: translateY(0);
}

.action-btn {
    padding: 14px 40px;
    min-width: 140px;
}

.action-btn.stop {
    background: #c45a4a;
}

.action-btn.stop:hover {
    background: #a84838;
}

.restart-btn {
    background: transparent;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
    padding: 12px 28px;
    font-size: 0.95rem;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 24px;
    transition: all 0.2s ease;
    font-weight: 500;
}

.restart-btn:hover {
    background: var(--color-bg);
    border-color: var(--color-text-light);
}

.result {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    margin: 24px 0;
    padding: 24px;
    background: var(--color-bg);
    border-radius: 12px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 450px;
    line-height: 1.6;
}

.message {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-accent);
    margin: 32px 0;
    padding: 24px;
    background: var(--color-bg);
    border-radius: 12px;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.hidden {
    display: none !important;
}

#guessSection {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    margin: 20px 0;
}

#guessInput,
.email-input {
    padding: 14px 20px;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.2s ease;
    background: white;
}

#guessInput {
    width: 250px;
    text-align: center;
}

#guessInput:focus,
.email-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

#guessInput::-webkit-inner-spin-button,
#guessInput::-webkit-outer-spin-button {
    opacity: 1;
}

/* Signup Section */
.signup-section {
    padding: 40px 40px 50px;
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
}

.signup-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.signup-title {
    font-family: 'Lora', serif;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.signup-description {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.signup-form {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.email-input {
    flex: 1;
    min-width: 280px;
}

.signup-checkbox {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.signup-checkbox input[type="checkbox"] {
    cursor: pointer;
}

.signup-checkbox label {
    cursor: pointer;
}

.signup-message {
    margin-top: 16px;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.95rem;
}

.signup-message.success {
    background: #d4edda;
    color: #155724;
}

.signup-message.error {
    background: #f8d7da;
    color: #721c24;
}

/* Footer */
.footer {
    padding: 30px;
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    background: var(--color-card);
    border-top: 1px solid var(--color-border);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-content {
        padding: 60px 40px;
    }

    .content-wrapper {
        gap: 60px;
    }

    .hero-column {
        max-width: 500px;
    }

    .checkin-column {
        max-width: 480px;
    }
}

@media (max-width: 1024px) {
    .content-wrapper {
        flex-direction: column;
        gap: 50px;
        align-items: center;
    }

    .hero-column {
        padding-top: 0;
        text-align: center;
        max-width: 600px;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .checkin-column {
        max-width: 600px;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 40px 24px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1.125rem;
    }

    .container {
        padding: 40px 28px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .signup-section {
        padding: 60px 24px;
    }

    .signup-title {
        font-size: 1.75rem;
    }

    .signup-form {
        flex-direction: column;
        align-items: stretch;
    }

    .email-input {
        min-width: 100%;
    }

    .signup-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0 24px;
    }

    .logo-text {
        font-size: 1.5rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .mode-buttons {
        max-width: 100%;
    }

    .action-btn {
        font-size: 1rem;
        padding: 14px 36px;
    }
}