/**
 * Password Generator App Styles
 *
 * A production-ready password generator with accessible, responsive design
 */

/* ========================================
   App Page Layout
   ======================================== */

.app-page {
    padding: var(--space-4);
    padding-top: calc(var(--header-height) + var(--space-4));
    min-height: calc(100vh - var(--header-height));
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.app-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.app-header h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-2);
}

.app-description {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ========================================
   Password Generator
   ======================================== */

.password-generator {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Password Display Area
   ======================================== */

.pg-display-area {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}

.pg-password-container {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.pg-password {
    flex: 1;
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    padding: var(--space-4);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    word-break: break-all;
    user-select: all;
    min-height: 60px;
    display: flex;
    align-items: center;
    line-height: 1.4;
}

.pg-password-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* ========================================
   Strength Indicator
   ======================================== */

.pg-strength {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.pg-strength-bar {
    flex: 1;
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.pg-strength-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width var(--transition-base), background var(--transition-base);
    width: 0%;
}

/* Strength levels */
.pg-strength-fill[data-strength="weak"] {
    width: 25%;
    background: var(--color-error, #ef4444);
}

.pg-strength-fill[data-strength="fair"] {
    width: 50%;
    background: #f59e0b;
}

.pg-strength-fill[data-strength="strong"] {
    width: 75%;
    background: #22c55e;
}

.pg-strength-fill[data-strength="very-strong"] {
    width: 100%;
    background: #10b981;
}

.pg-strength-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    min-width: 90px;
    text-align: end;
    color: var(--color-text-muted);
}

.pg-strength-label[data-strength="weak"] {
    color: var(--color-error-text, #dc2626);
}

.pg-strength-label[data-strength="fair"] {
    color: var(--color-warning-text, #b45309);
}

.pg-strength-label[data-strength="strong"] {
    color: var(--color-success-text, #047857);
}

.pg-strength-label[data-strength="very-strong"] {
    color: var(--color-success-text, #047857);
}

/* ========================================
   Options Section
   ======================================== */

.pg-options {
    padding: var(--space-4) var(--space-6);
    background: var(--color-bg-alt);
}

.pg-option-group {
    margin-bottom: var(--space-4);
}

.pg-option-group:last-child {
    margin-bottom: 0;
}

/* Length Control */
.pg-length-group label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.pg-length-value {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--color-primary);
    background: var(--color-bg-card);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    min-width: 40px;
    text-align: center;
}

.pg-slider-container {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.pg-slider-min,
.pg-slider-max {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.pg-slider {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-bg-card);
    border-radius: var(--radius-full);
    outline: none;
    border: 1px solid var(--color-border);
}

.pg-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast);
}

.pg-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.pg-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
}

.pg-slider:focus-visible {
    box-shadow: var(--focus-ring);
}

/* Character Types Fieldset */
.pg-characters-group {
    border: none;
    padding: 0;
    margin: 0;
}

.pg-characters-group legend {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-3);
}

/* Toggle Switches */
.pg-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    padding: var(--space-2) 0;
    user-select: none;
}

.pg-toggle input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.pg-toggle-slider {
    position: relative;
    flex-shrink: 0;
    width: 44px;
    height: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.pg-toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.pg-toggle input:checked + .pg-toggle-slider {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.pg-toggle input:checked + .pg-toggle-slider::after {
    transform: translateX(20px);
}

.pg-toggle input:focus-visible + .pg-toggle-slider {
    box-shadow: var(--focus-ring);
}

.pg-toggle-label {
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.pg-toggle-chars {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-left: var(--space-1);
}

/* Multiple Passwords Select */
.pg-count-group {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.pg-count-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.pg-select {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
}

.pg-select:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ========================================
   Action Buttons
   ======================================== */

.pg-actions {
    padding: var(--space-4) var(--space-6);
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
}

.pg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), transform 0.1s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    border: none;
}

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

.pg-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.pg-btn-primary {
    background: var(--color-primary);
    color: white;
    width: 100%;
    padding: var(--space-4);
    font-size: var(--font-size-base);
}

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

.pg-btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.pg-btn-icon:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.pg-btn-icon svg {
    width: 20px;
    height: 20px;
}

.pg-btn-success {
    background: #22c55e !important;
    color: white !important;
    border-color: #22c55e !important;
}

/* ========================================
   Multiple Passwords List
   ======================================== */

.pg-passwords-list {
    padding: var(--space-4) var(--space-6);
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.pg-passwords-list[hidden] {
    display: none;
}

.pg-passwords-list h2 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.pg-passwords-container {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-4) 0;
}

.pg-password-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}

.pg-password-item:last-child {
    margin-bottom: 0;
}

.pg-password-text {
    flex: 1;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    word-break: break-all;
    user-select: all;
}

.pg-copy-individual {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    color: var(--color-text-muted);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
}

.pg-copy-individual:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.pg-btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    width: 100%;
}

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

/* ========================================
   Accessibility Announcements
   ======================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 600px) {
    .app-page {
        padding: var(--space-2);
        padding-top: calc(var(--header-height) + var(--space-2));
    }

    .app-header {
        margin-bottom: var(--space-4);
    }

    .pg-display-area,
    .pg-options,
    .pg-actions,
    .pg-passwords-list {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }

    .pg-password {
        font-size: var(--font-size-base);
        padding: var(--space-3);
        min-height: 50px;
    }

    .pg-password-container {
        flex-wrap: wrap;
    }

    .pg-password {
        width: 100%;
        order: 1;
    }

    .pg-password-actions {
        flex-direction: row;
        width: 100%;
        order: 2;
        justify-content: flex-end;
    }
}

@media (max-width: 400px) {
    .pg-strength {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-2);
    }

    .pg-strength-label {
        text-align: center;
    }

    .pg-count-group {
        flex-direction: column;
        align-items: stretch;
    }

    .pg-select {
        width: 100%;
    }
}

/* ========================================
   Reduced Motion
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    .pg-btn,
    .pg-toggle-slider,
    .pg-toggle-slider::after,
    .pg-slider::-webkit-slider-thumb,
    .pg-strength-fill {
        transition: none;
    }

    .pg-btn:active {
        transform: none;
    }

    .pg-slider::-webkit-slider-thumb:hover {
        transform: none;
    }
}

/* ========================================
   Help Panel (Modal)
   ======================================== */

.help-panel {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.help-panel[hidden] {
    display: none;
}

.help-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background: var(--color-bg-card);
}

.help-header h2 {
    font-size: var(--font-size-lg);
    margin: 0;
}

.help-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
}

.help-close:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.help-close:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.help-body {
    padding: var(--space-6);
}

.help-section {
    margin-bottom: var(--space-6);
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-4);
    color: var(--color-text);
}

.help-steps {
    margin: 0;
    padding-left: var(--space-5);
}

.help-steps li {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.help-features {
    margin: 0;
    padding-left: var(--space-5);
}

.help-features li {
    margin-bottom: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ========================================
   Header Actions
   ======================================== */

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    cursor: pointer;
}

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

.btn-icon:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .pg-actions,
    .pg-passwords-list,
    .help-panel,
    .nav-actions {
        display: none;
    }

    .password-generator {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .pg-options {
        background: white;
    }
}