/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #1a73e8;
    --primary-hover: #1557b0;
    --error-color: #d93025;
    --success-color: #188038;
    --background: #f8f9fa;
    --surface: #ffffff;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --border-color: #dadce0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-elevated: 0 3px 6px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.12);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* Screen Layout */
.screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.hidden {
    display: none !important;
}

/* Container */
.container {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow-elevated);
    padding: 2rem;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Typography */
h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-align: center;
}

.subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 1.5rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

input[type="text"],
input[type="password"],
input[type="date"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

input::placeholder {
    color: var(--text-secondary);
}

small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Checkbox Group */
.checkbox-group {
    margin-top: 0.5rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-group input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background-color: var(--background);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-small:hover {
    background-color: var(--border-color);
}

.btn-copy {
    padding: 0.5rem;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.btn-copy:hover {
    background-color: var(--background);
    color: var(--primary-color);
}

/* Error Message */
.error {
    color: var(--error-color);
    font-size: 0.875rem;
    text-align: center;
    margin-top: 1rem;
}

/* Result Display */
.result {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background-color: var(--background);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.result label {
    margin-bottom: 0.5rem;
}

.password-display {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.password-display code {
    flex: 1;
    font-family: 'SF Mono', 'Consolas', 'Liberation Mono', monospace;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    padding: 0.75rem 1rem;
    background: var(--surface);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    letter-spacing: 0.05em;
    word-break: break-all;
}

/* Feedback */
.feedback {
    font-size: 0.875rem;
    color: var(--success-color);
    margin-top: 0.5rem;
    text-align: center;
}

/* Info Box */
.info-box {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #e8f0fe;
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-box p {
    margin: 0;
}

/* Responsive Adjustments */
@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
        border-radius: 0;
        box-shadow: none;
        max-width: none;
    }

    .screen {
        padding: 0;
        align-items: flex-start;
    }

    h1 {
        font-size: 1.25rem;
    }

    .password-display code {
        font-size: 1rem;
    }
}

/* PWA Install Banner (optional) */
@media (display-mode: standalone) {
    .container {
        padding-top: env(safe-area-inset-top, 1rem);
    }
}

/* Biometric Button */
.btn-biometric {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
}

.btn-biometric svg {
    flex-shrink: 0;
}

/* Success Button (for enabled state) */
.btn-success {
    width: 100%;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669, #047857);
}

/* Button Group (3 equal-width buttons) */
.btn-group {
    display: flex;
    gap: 0.5rem;
}

.btn-generate {
    flex: 1;
    padding: 0.75rem 0.5rem;
    font-size: 0.875rem;
    background-color: var(--primary-color);
    color: white;
}

.btn-generate:hover {
    background-color: var(--primary-hover);
}

/* Screen with footer (for version) */
.screen-with-footer {
    flex-direction: column;
    justify-content: center;
}

/* Version display */
.version {
    position: absolute;
    bottom: 1rem;
    left: 0;
    right: 0;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
    opacity: 0.6;
}

/* Barcode container in result */
.barcode-container {
    margin-top: 1rem;
    padding-top: 1rem;
    text-align: center;
    cursor: pointer;
    border-top: 1px solid var(--border-color);
}

.barcode-container svg {
    max-width: 100%;
    height: auto;
}

/* Fullscreen barcode overlay */
.barcode-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.barcode-fullscreen svg {
    max-width: 95vw;
    max-height: 70vh;
}

/* Stacked barcodes for portrait fullscreen (SvcAdmin mode) */
.stacked-barcodes {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.stacked-barcodes svg {
    max-width: 95vw;
}

.btn-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    color: var(--text-primary);
}

.btn-close:hover {
    background: var(--border-color);
}

/* Dot indicators for swipe navigation */
.barcode-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.barcode-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ccc;
    transition: background 0.2s;
}

.barcode-dots .dot.active {
    background: #1a73e8;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #1a1a1a;
        --surface: #2d2d2d;
        --text-primary: #e8eaed;
        --text-secondary: #9aa0a6;
        --border-color: #5f6368;
    }

    .info-box {
        background-color: #1a365d;
    }

    /* Keep barcode fullscreen white for scanning */
    .barcode-fullscreen {
        background: white;
    }
}