/**
 * Offline License Activation - Styles
 * 
 * Constitution Principle I: Vanilla CSS (no preprocessors, no frameworks)
 * Phase 5 (US3): BICO design language implementation
 */

/* BICO Design Tokens (T059) */
:root {
    /* Colors inspired by BICO branding */
    --bico-primary: #0077C8;
    --bico-primary-hover: #005A9C;
    --bico-primary-light: #E5F3FA;
    --bico-secondary: #00A0D2;
    --bico-accent: #A8D5E2;
    --bico-dark: #222222;
    --bico-gray: #666666;
    --bico-light-gray: #CCCCCC;
    --bico-background: #F8F9FA;
    --bico-white: #FFFFFF;
    --bico-success: #28A745;
    --bico-success-light: #D4EDDA;
    --bico-error: #DC3545;
    --bico-error-light: #F8D7DA;
    
    /* Typography */
    --bico-font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --bico-font-size-base: 16px;
    --bico-font-size-h1: 2.5rem;
    --bico-font-size-h2: 1.5rem;
    --bico-font-size-small: 0.875rem;
    --bico-font-weight-normal: 400;
    --bico-font-weight-medium: 500;
    --bico-font-weight-bold: 700;
    
    /* Spacing */
    --bico-spacing-xs: 0.5rem;
    --bico-spacing-sm: 1rem;
    --bico-spacing-md: 1.5rem;
    --bico-spacing-lg: 2rem;
    --bico-spacing-xl: 3rem;
    
    /* Border Radius */
    --bico-radius-sm: 4px;
    --bico-radius-md: 8px;
    --bico-radius-lg: 12px;
    
    /* Shadows */
    --bico-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --bico-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --bico-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* CSS Reset / Normalization */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--bico-font-family);
    font-size: var(--bico-font-size-base);
    line-height: 1.6;
    color: var(--bico-dark);
    background: linear-gradient(135deg, var(--bico-background) 0%, var(--bico-primary-light) 100%);
    padding: var(--bico-spacing-lg);
    min-height: 100vh;
}

.container {
    max-width: 650px;
    margin: 0 auto;
    background: var(--bico-white);
    padding: var(--bico-spacing-xl);
    border-radius: var(--bico-radius-lg);
    box-shadow: var(--bico-shadow-lg);
}

header {
    margin-bottom: var(--bico-spacing-xl);
    text-align: center;
    border-bottom: 3px solid var(--bico-primary);
    padding-bottom: var(--bico-spacing-md);
}

h1 {
    font-size: var(--bico-font-size-h1);
    font-weight: var(--bico-font-weight-bold);
    color: var(--bico-primary);
    margin-bottom: var(--bico-spacing-xs);
}

.subtitle {
    color: var(--bico-gray);
    font-size: var(--bico-font-size-base);
    font-weight: var(--bico-font-weight-normal);
}

main {
    margin-top: var(--bico-spacing-md);
}

/* Step-by-step instructions (T061) */
.instructions {
    background: var(--bico-primary-light);
    padding: var(--bico-spacing-md);
    border-radius: var(--bico-radius-md);
    margin-bottom: var(--bico-spacing-lg);
    border-left: 4px solid var(--bico-primary);
}

.instructions h2 {
    font-size: var(--bico-font-size-h2);
    color: var(--bico-primary);
    margin-bottom: var(--bico-spacing-sm);
    font-weight: var(--bico-font-weight-bold);
}

.instructions ol {
    margin-left: var(--bico-spacing-md);
    color: var(--bico-dark);
}

.instructions li {
    margin-bottom: var(--bico-spacing-xs);
    line-height: 1.8;
}

.form-group {
    margin-bottom: var(--bico-spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--bico-spacing-xs);
    font-weight: var(--bico-font-weight-medium);
    color: var(--bico-dark);
    font-size: var(--bico-font-size-base);
}

input[type="text"],
input[type="file"] {
    width: 100%;
    padding: var(--bico-spacing-sm);
    border: 2px solid var(--bico-light-gray);
    border-radius: var(--bico-radius-sm);
    font-size: var(--bico-font-size-base);
    font-family: var(--bico-font-family);
    transition: all 0.3s ease;
    background-color: var(--bico-white);
}

/* Focus and hover states (T069) */
input[type="text"]:focus,
input[type="file"]:focus {
    outline: none;
    border-color: var(--bico-primary);
    box-shadow: 0 0 0 3px var(--bico-primary-light);
}

input[type="text"]:hover,
input[type="file"]:hover {
    border-color: var(--bico-primary);
}

.btn-primary {
    width: 100%;
    padding: var(--bico-spacing-md);
    background-color: var(--bico-primary);
    color: var(--bico-white);
    border: none;
    border-radius: var(--bico-radius-sm);
    font-size: var(--bico-font-size-base);
    font-weight: var(--bico-font-weight-bold);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--bico-shadow-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    background-color: var(--bico-primary-hover);
    box-shadow: var(--bico-shadow-md);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--bico-shadow-sm);
}

.btn-primary:disabled {
    background-color: var(--bico-light-gray);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* Reset button (T067) */
.btn-secondary {
    width: 100%;
    padding: var(--bico-spacing-sm);
    background-color: var(--bico-white);
    color: var(--bico-primary);
    border: 2px solid var(--bico-primary);
    border-radius: var(--bico-radius-sm);
    font-size: var(--bico-font-size-base);
    font-weight: var(--bico-font-weight-medium);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: var(--bico-spacing-sm);
}

.btn-secondary:hover {
    background-color: var(--bico-primary-light);
    box-shadow: var(--bico-shadow-sm);
}

/* Loading indicator (T062, T063) */
.loading-indicator {
    margin-top: var(--bico-spacing-md);
    padding: var(--bico-spacing-md);
    background-color: var(--bico-primary-light);
    border-radius: var(--bico-radius-md);
    text-align: center;
    border-left: 4px solid var(--bico-secondary);
    animation: pulse 1.5s ease-in-out infinite;
}

.loading-indicator .spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--bico-primary-light);
    border-top-color: var(--bico-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: var(--bico-spacing-xs);
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Success message (T065, T066) */
.success-message {
    margin-top: var(--bico-spacing-md);
    padding: var(--bico-spacing-md);
    border-radius: var(--bico-radius-md);
    background-color: var(--bico-success-light);
    color: var(--bico-dark);
    border-left: 4px solid var(--bico-success);
    box-shadow: var(--bico-shadow-sm);
}

.success-message h3 {
    color: var(--bico-success);
    margin-bottom: var(--bico-spacing-xs);
    font-size: var(--bico-font-size-h2);
}

.success-message p {
    margin-bottom: var(--bico-spacing-xs);
    line-height: 1.8;
}

.status-message {
    margin-top: var(--bico-spacing-md);
    padding: var(--bico-spacing-md);
    border-radius: var(--bico-radius-md);
    font-weight: var(--bico-font-weight-medium);
    box-shadow: var(--bico-shadow-sm);
}

.status-message.success {
    background-color: var(--bico-success-light);
    color: var(--bico-dark);
    border-left: 4px solid var(--bico-success);
}

.status-message.error {
    background-color: var(--bico-error-light);
    color: var(--bico-dark);
    border-left: 4px solid var(--bico-error);
}

/* Error message styling (T054) */
.error-message {
    margin-top: var(--bico-spacing-md);
    padding: var(--bico-spacing-md);
    border-radius: var(--bico-radius-md);
    font-weight: var(--bico-font-weight-medium);
    background-color: var(--bico-error-light);
    color: var(--bico-dark);
    border-left: 4px solid var(--bico-error);
    box-shadow: var(--bico-shadow-sm);
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        padding: var(--bico-spacing-sm);
    }
    
    .container {
        padding: var(--bico-spacing-md);
    }
    
    h1 {
        font-size: 2rem;
    }
}