/* CSS Variables - Design Tokens */
:root {
    /* Colors */
    --color-primary: #1677ff;
    --color-primary-hover: #4096ff;
    --color-text-primary: rgba(0, 0, 0, 0.85);
    --color-text-secondary: rgba(0, 0, 0, 0.65);
    --color-bg-page: #f5f5f5;
    --color-bg-container: #ffffff;
    --color-border: rgba(0, 0, 0, 0.1);
    --color-disabled: #bfbfbf;

    /* Error colors */
    --color-error-bg: #fff1f0;
    --color-error-border: #ffccc7;
    --color-error-text: #cf1322;

    /* Spacing */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 1rem;      /* 16px */
    --spacing-md: 1.5rem;    /* 24px */
    --spacing-lg: 2.5rem;    /* 40px */

    /* Font sizes */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-base: 1rem;    /* 16px */
    --font-size-lg: 1.25rem;   /* 20px */
    --font-size-emoji: 4.5rem; /* 72px */

    /* Border radius */
    --radius-sm: 0.375rem;  /* 6px */
    --radius-md: 0.5rem;    /* 8px */

    /* Shadows */
    --shadow-container: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Other */
    --logo-size: 5rem;  /* 80px */
    --container-max-width: 31.25rem;  /* 500px */
    --line-height-base: 1.6;
}

/* Keyframe animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-0.5rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.03);
    }
}

/* Styles inspired by Ant Design 5 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg-page);
    color: var(--color-text-primary);
    margin: 0;
    padding: var(--spacing-md) var(--spacing-sm);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    padding: var(--spacing-lg);
    background: var(--color-bg-container);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-container);
    flex-shrink: 0;
    box-sizing: border-box;
    animation: fadeIn var(--transition-smooth) ease-out;
}

.logo {
    width: var(--logo-size);
    opacity: 0.7;
    cursor: pointer;
    margin-top: var(--spacing-lg);
    flex-shrink: 0;
    transition: all var(--transition-fast);
    animation: slideIn var(--transition-smooth) 0.2s ease-out;
}

.logo:hover {
    opacity: 1;
    transform: translateY(-0.125rem);
}

.emoji {
    font-size: var(--font-size-emoji);
    margin-bottom: var(--spacing-md);
    user-select: none;
    animation: pulse 2s ease-in-out infinite;
}

h1 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0 0 var(--spacing-sm) 0;
}

p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
    line-height: var(--line-height-base);
}

/* Button styles - shared for retry-button and wake-button */
.retry-button,
.wake-button {
    margin-top: var(--spacing-md);
    background-color: var(--color-primary);
    color: var(--color-bg-container);
    border: none;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    box-shadow: 0 0.125rem 0.25rem rgba(22, 119, 255, 0.2);
}

.retry-button:hover,
.wake-button:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-0.0625rem);
    box-shadow: 0 0.25rem 0.5rem rgba(22, 119, 255, 0.3);
}

.retry-button:active,
.wake-button:active {
    transform: translateY(0);
    box-shadow: 0 0.0625rem 0.125rem rgba(22, 119, 255, 0.2);
}

.retry-button:disabled,
.wake-button:disabled {
    background-color: var(--color-disabled);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Error message box */
.error-message {
    margin-top: var(--spacing-sm);
    padding: 0.75rem var(--spacing-sm);
    background-color: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-radius: var(--radius-sm);
    color: var(--color-error-text);
    line-height: var(--line-height-base);
    text-align: left;
    animation: slideIn var(--transition-smooth) ease-out;
}

.error-message .error-header {
    margin-bottom: var(--spacing-xs);
}

.error-message .error-title {
    font-weight: 600;
    margin: 0;
}

.error-message .error-description {
    margin: 0;
}

.error-message .error-link {
    color: var(--color-error-text);
    text-decoration: underline;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.error-message .error-link:hover {
    opacity: 0.8;
}