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

a {
    text-decoration: none;
}

ul, ol, li {
    list-style: none;
}

html,
body {
    height: 100%;
    line-height: 1.5;
    font-size: 16px;
    color: #000;
}

img, picture, video, canvas, svg {
    vertical-align: top;
}

input, button, textarea, select {
    font: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: inherit;
    font-size: inherit;
}

/* ==================== Font Import ==================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

/* ==================== Design System Variables ==================== */
:root {
    /* colors - light theme (modern palette) */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    --color-background: #fafbfc;
    --color-surface: #ffffff;
    --color-text-primary: #374151;
    --color-text-secondary: #6b7280;
    --color-text-muted: #6b7280; /* improved contrast from #9ca3af */
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;
    --color-input-bg: #f9fafb;
    --color-input-border: #e5e7eb;
    --color-input-focus: #2563eb;
    --color-tooltip-bg: #2d3748;
    --color-tooltip-text: #ffffff;
    
    /* spacing - 8px grid system */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    --spacing-5xl: 96px;
    
    /* typography - Inter font with proper scale */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-brand: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    
    /* font sizes - proper type scale */
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */
    --text-4xl: 2.25rem;   /* 36px */
    
    /* font weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* border radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* ==================== Base Styles ==================== */
body {
    background: var(--color-background);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: 1.6;
    min-width: 320px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.01em;
}

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: 1.2;
    margin: 0;
    letter-spacing: -0.025em;
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    letter-spacing: -0.03em;
}

h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
}

h3 {
    font-size: var(--text-xl);
    font-weight: var(--font-medium);
}

p {
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin: 0 0 var(--spacing-md) 0;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.input-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

/* ==================== Form Controls ==================== */
textarea,
input[type=text],
input[type=number],
input[type=password],
select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    font-weight: var(--font-normal);
    background: var(--color-input-bg);
    color: var(--color-text-primary);
    border: 1px solid var(--color-input-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
    letter-spacing: -0.01em;
}

textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.5;
}

input:focus,
textarea:focus,
select:focus {
    background: var(--color-surface);
    border-color: var(--color-input-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-muted);
}

/* pin input - single field */
input.pin-input {
    font-family: var(--font-mono);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    letter-spacing: 0.2em;
    text-align: center;
    max-width: 220px;
    padding: var(--spacing-md) var(--spacing-lg);
}

/* number input */
input[type="number"] {
    -webkit-appearance: textfield;
    -moz-appearance: textfield;
    appearance: textfield;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
}

/* select dropdown */
select {
    cursor: pointer;
    padding-right: 40px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748b' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/* ==================== Buttons ==================== */
.main-btn,
button[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: white;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 56px;
    width: 100%;
    letter-spacing: -0.01em;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.btn-icon {
    flex-shrink: 0;
    transform: translateY(-1px); /* lift icon up slightly */
}

.button-text {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.main-btn:hover,
button[type="submit"]:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px 0 rgba(37, 99, 235, 0.25), 0 2px 4px 0 rgba(0, 0, 0, 0.05);
}

.main-btn:active,
button[type="submit"]:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.main-btn:disabled,
button[type="submit"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.second-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-primary);
    background: var(--color-surface);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 48px;
    width: 100%;
    text-decoration: none;
}

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

.main-btn-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: white;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
    min-height: 48px;
    width: 100%;
}

.main-btn-link:hover {
    background: var(--color-primary-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ==================== App Layout ==================== */
.app {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
}

.app-container {
    width: 100%;
    max-width: 580px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.logo-title {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-md) 0;
}

.logo-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: opacity var(--transition-fast);
}

.logo-link:hover {
    opacity: 0.8;
    color: var(--color-text-primary);
}


.app-name {
    font-family: var(--font-brand);
    font-size: 2rem;
    font-weight: var(--font-bold);
    letter-spacing: -0.01em;
    color: var(--color-primary);
    position: relative;
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Fallback for browsers that don't support background-clip */
@supports not (-webkit-background-clip: text) {
    .app-name {
        color: var(--color-primary);
        background: none;
    }
}

.main-content {
    flex: 1;
}

/* ==================== Cards ==================== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    border: 1px solid var(--color-border);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.1), 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    border-color: var(--color-border-hover);
}

.card-header {
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.card-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.card-title-with-icon {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.title-icon {
    color: var(--color-success);
    flex-shrink: 0;
}

/* ==================== Form Groups ==================== */
.form-group {
    margin-bottom: var(--spacing-2xl);
}

.form-row {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 640px) {
    .form-row.two-cols {
        grid-template-columns: 1fr 1fr;
    }
}


.expire-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-md);
    align-items: end;
}

/* ==================== Messages & Alerts ==================== */
.error {
    font-family: var(--font-sans);
    color: var(--color-error);
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: var(--spacing-xs);
    animation: fadeIn 0.3s ease;
    text-align: center;
    display: block;
    letter-spacing: -0.01em;
}

.success {
    font-family: var(--font-sans);
    color: var(--color-success);
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: var(--spacing-xs);
    animation: fadeIn 0.3s ease;
    text-align: center;
    display: block;
    letter-spacing: -0.01em;
}

.error-block {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--color-error);
}

.success-message {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--color-success);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== Tooltip ==================== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
    cursor: help;
    margin-left: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.tooltip:hover .tooltip-icon {
    color: var(--color-primary);
}

.tooltip-text {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    z-index: 1000;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-tooltip-bg);
    color: var(--color-tooltip-text);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    font-weight: var(--font-medium);
    white-space: nowrap;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    letter-spacing: -0.01em;
}

.tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: var(--color-tooltip-bg) transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* ==================== Steps (About Page) ==================== */
.how-it-works-container {
    margin: var(--spacing-3xl) 0;
}

.how-it-works-container h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.steps-container {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.step-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.step-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.circle {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.25rem;
}

.step-text {
    flex: 1;
}

.step-text p {
    margin: 0;
    color: var(--color-text-secondary);
}

/* ==================== App Footer ==================== */
.app-footer {
    text-align: center;
    padding-top: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.copyright {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-link {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 400;
}

.footer-link:hover {
    color: var(--color-primary);
}

.separator {
    color: var(--color-text-muted);
    opacity: 0.5;
    font-size: 0.8rem;
}

/* ==================== Popup/Modal ==================== */
.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.popup.active {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    width: 90%;
    max-width: 420px;
    max-height: 80vh;
    overflow: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95);
    transition: transform var(--transition-base);
    position: relative;
    text-align: center;
}

.popup.active .popup-content {
    transform: scale(1);
}

.popup-header {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
}

.popup-text {
    font-size: 1.1rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    margin-top: var(--spacing-md);
}

.popup-text strong {
    display: block;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.close-popup {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-text-muted);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    opacity: 0.7;
}

.close-popup:hover {
    background: var(--color-text-primary);
    opacity: 1;
    transform: scale(1.1);
}

.close-popup img {
    width: 16px;
    height: 16px;
    filter: invert(1);
}

/* ==================== Specific Pages ==================== */
.show-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}

.load-msg-form {
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
    text-align: center;
}

.load-msg-form .card-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.load-msg-form .card-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
}

.load-msg-form .card-description {
    font-size: 1rem;
    opacity: 0.8;
}

.load-msg-form .form-group {
    margin-bottom: var(--spacing-xl);
}

.load-msg-form .form-group label {
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    font-weight: 500;
}

.load-msg-form .pin-input {
    margin: 0 auto;
    display: block;
    max-width: 240px;
    text-align: center;
    font-size: 1.2rem;
    padding: 16px 20px;
    letter-spacing: 0.2em;
}

.msg-link-text {
    margin: var(--spacing-lg) 0;
}


.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: var(--spacing-xl);
}

.error-card {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-3xl) var(--spacing-xl);
}

.error-message {
    font-family: var(--font-sans);
    font-size: 1.4rem;
    color: var(--color-error);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.5;
    font-weight: 600;
    text-align: center;
    letter-spacing: -0.01em;
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .app {
        padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    }
    
    .app-container {
        gap: var(--spacing-lg);
    }
    
    body {
        font-size: 17px;
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .expire-container {
        grid-template-columns: 1fr;
    }
    
    .step-card {
        padding: var(--spacing-md);
    }
    
    .app-name {
        font-size: 1.2rem;
    }
    
    .card-title {
        font-size: 1.3rem;
    }
    
    .theme-toggle {
        top: var(--spacing-md);
        right: var(--spacing-md);
        width: 38px;
        height: 38px;
        font-size: 1.1rem;
    }
    
    .app-footer .footer-links .separator {
        display: none;
    }
}

@media (max-width: 480px) {
    .popup-content {
        width: 95%;
        padding: var(--spacing-lg);
    }
    
    input.pin-input {
        max-width: 160px;
        font-size: 1.25rem;
    }
    
    
    .app-name {
        font-size: 1.1rem;
    }
}

/* ==================== Loading States ==================== */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* htmx loading indicators */
.htmx-indicator {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
}

.htmx-request .htmx-indicator {
    display: inline-flex;
}

.htmx-request .button-text {
    display: none;
}

.spinner-icon {
    animation: spin 1s linear infinite;
}

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

/* smooth transitions for htmx swaps */
.htmx-swapping {
    opacity: 0;
    transition: opacity 200ms ease-out;
}

.htmx-settling {
    opacity: 1;
    transition: opacity 200ms ease-in;
}

/* fade animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

/* ==================== Toast Notifications ==================== */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1000;
    pointer-events: none;
}

.toast {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease-out;
    pointer-events: auto;
    min-width: 300px;
    max-width: 500px;
}

.toast.success {
    border-color: var(--color-success);
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.toast.error {
    border-color: var(--color-error);
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(239, 68, 68, 0.05) 100%);
}

.toast.warning {
    border-color: var(--color-warning);
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.toast-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-text-primary);
}

.toast-body {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ==================== Dark Theme ==================== */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #3b82f6;
        --color-primary-hover: #2563eb;
        --color-primary-light: #1e3a8a;
        --color-success: #34d399;
        --color-error: #f87171;
        --color-warning: #fbbf24;
        --color-background: #111827;
        --color-surface: #1f2937;
        --color-text-primary: #f9fafb;
        --color-text-secondary: #d1d5db;
        --color-text-muted: #6b7280; /* improved contrast from #9ca3af */
        --color-border: #374151;
        --color-border-hover: #4b5563;
        --color-input-bg: #1f2937;
        --color-input-border: #374151;
        --color-input-focus: #3b82f6;
        --color-tooltip-bg: #374151;
        --color-tooltip-text: #ffffff;
    }
    
    .error-block {
        background: #451a1a;
        border-color: #b91c1c;
    }
    
    .success-message {
        background: #064e3b;
        border-color: #047857;
    }
}

/* manual theme overrides */
[data-theme="light"] {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    --color-background: #fafbfc;
    --color-surface: #ffffff;
    --color-text-primary: #374151;
    --color-text-secondary: #6b7280;
    --color-text-muted: #6b7280; /* improved contrast from #9ca3af */
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;
    --color-input-bg: #f9fafb;
    --color-input-border: #e5e7eb;
    --color-input-focus: #2563eb;
    --color-tooltip-bg: #2d3748;
    --color-tooltip-text: #ffffff;
}

[data-theme="dark"] {
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #1e3a8a;
    --color-success: #34d399;
    --color-error: #f87171;
    --color-warning: #fbbf24;
    --color-background: #111827;
    --color-surface: #1f2937;
    --color-text-primary: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-text-muted: #6b7280; /* improved contrast from #9ca3af */
    --color-border: #374151;
    --color-border-hover: #4b5563;
    --color-input-bg: #1f2937;
    --color-input-border: #374151;
    --color-input-focus: #3b82f6;
    --color-tooltip-bg: #374151;
    --color-tooltip-text: #ffffff;
}

[data-theme="dark"] .error-block {
    background: #451a1a;
    border-color: #b91c1c;
}

[data-theme="dark"] .success-message {
    background: #064e3b;
    border-color: #047857;
}

/* ==================== Theme Toggle ==================== */
.theme-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    backdrop-filter: blur(10px);
    padding: 0;
}

.theme-toggle svg {
    display: block;
    margin: auto;
}

.theme-toggle:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* ==================== Accessibility ==================== */
.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;
}

/* focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0ms !important;
    }
}