/* ==========================================
   MODERN TYPOGRAPHY & SPACING SYSTEM
   Inter font with refined hierarchy and 8px spacing grid
   ========================================== */

/* ========== ROOT VARIABLES ========== */
:root {
    /* Spacing System (8px base unit) */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Typography Scale */
    --font-size-h1: 32px;
    --font-size-h2: 28px;
    --font-size-h3: 24px;
    --font-size-h4: 20px;
    --font-size-h5: 18px;
    --font-size-h6: 16px;
    --font-size-body1: 15px;
    --font-size-body2: 14px;
    --font-size-caption: 13px;
    --font-size-small: 12px;

    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.6;
    --line-height-loose: 1.75;

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows (minimal) */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.05);
}

/* ========== GLOBAL STYLES ========== */
* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--font-size-body1);
    line-height: var(--line-height-relaxed);
    font-weight: var(--font-weight-normal);
}

/* ========== TYPOGRAPHY ========== */
h1, .mud-typography-h1 {
    font-size: var(--font-size-h1) !important;
    font-weight: var(--font-weight-bold) !important;
    letter-spacing: -0.5px !important;
    line-height: var(--line-height-tight) !important;
    margin-bottom: var(--spacing-lg);
}

h2, .mud-typography-h2 {
    font-size: var(--font-size-h2) !important;
    font-weight: var(--font-weight-bold) !important;
    letter-spacing: -0.5px !important;
    line-height: var(--line-height-tight) !important;
    margin-bottom: var(--spacing-md);
}

h3, .mud-typography-h3 {
    font-size: var(--font-size-h3) !important;
    font-weight: var(--font-weight-semibold) !important;
    letter-spacing: -0.3px !important;
    line-height: var(--line-height-normal) !important;
    margin-bottom: var(--spacing-md);
}

h4, .mud-typography-h4 {
    font-size: var(--font-size-h4) !important;
    font-weight: var(--font-weight-semibold) !important;
    letter-spacing: -0.2px !important;
    line-height: var(--line-height-normal) !important;
    margin-bottom: var(--spacing-sm);
}

h5, .mud-typography-h5 {
    font-size: var(--font-size-h5) !important;
    font-weight: var(--font-weight-semibold) !important;
    line-height: var(--line-height-normal) !important;
    margin-bottom: var(--spacing-sm);
}

h6, .mud-typography-h6 {
    font-size: var(--font-size-h6) !important;
    font-weight: var(--font-weight-semibold) !important;
    line-height: var(--line-height-normal) !important;
    margin-bottom: var(--spacing-sm);
}

p, .mud-typography-body1 {
    font-size: var(--font-size-body1) !important;
    line-height: var(--line-height-relaxed) !important;
    margin-bottom: var(--spacing-md);
}

.mud-typography-body2 {
    font-size: var(--font-size-body2) !important;
    line-height: var(--line-height-normal) !important;
}

.mud-typography-caption {
    font-size: var(--font-size-caption) !important;
    letter-spacing: 0.3px !important;
    line-height: var(--line-height-normal) !important;
}

small, .mud-typography-small {
    font-size: var(--font-size-small) !important;
    line-height: var(--line-height-normal) !important;
}

/* ========== UTILITY CLASSES ========== */

/* Spacing Utilities */
.p-xs { padding: var(--spacing-xs) !important; }
.p-sm { padding: var(--spacing-sm) !important; }
.p-md { padding: var(--spacing-md) !important; }
.p-lg { padding: var(--spacing-lg) !important; }
.p-xl { padding: var(--spacing-xl) !important; }

.m-xs { margin: var(--spacing-xs) !important; }
.m-sm { margin: var(--spacing-sm) !important; }
.m-md { margin: var(--spacing-md) !important; }
.m-lg { margin: var(--spacing-lg) !important; }
.m-xl { margin: var(--spacing-xl) !important; }

.mt-xs { margin-top: var(--spacing-xs) !important; }
.mt-sm { margin-top: var(--spacing-sm) !important; }
.mt-md { margin-top: var(--spacing-md) !important; }
.mt-lg { margin-top: var(--spacing-lg) !important; }
.mt-xl { margin-top: var(--spacing-xl) !important; }

.mb-xs { margin-bottom: var(--spacing-xs) !important; }
.mb-sm { margin-bottom: var(--spacing-sm) !important; }
.mb-md { margin-bottom: var(--spacing-md) !important; }
.mb-lg { margin-bottom: var(--spacing-lg) !important; }
.mb-xl { margin-bottom: var(--spacing-xl) !important; }

/* Font Weight Utilities */
.font-light { font-weight: var(--font-weight-light) !important; }
.font-normal { font-weight: var(--font-weight-normal) !important; }
.font-medium { font-weight: var(--font-weight-medium) !important; }
.font-semibold { font-weight: var(--font-weight-semibold) !important; }
.font-bold { font-weight: var(--font-weight-bold) !important; }

/* Border Radius Utilities */
.rounded-sm { border-radius: var(--radius-sm) !important; }
.rounded-md { border-radius: var(--radius-md) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }
.rounded-full { border-radius: var(--radius-full) !important; }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }
.shadow-none { box-shadow: none !important; }

/* ========== LOADING INDICATOR ========== */
.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem auto;
}

.loading-progress circle {
    fill: none;
    stroke: #1A90B0;
    stroke-width: 0.5rem;
    transform-origin: 50% 50%;
    animation: loading-progress-spinner 2s ease-in-out infinite;
}

.loading-progress circle:last-child {
    stroke: rgba(26, 144, 176, 0.2);
    animation: none;
}

@keyframes loading-progress-spinner {
    0% {
        stroke-dasharray: 0.01rem 6.25rem;
        transform: rotate(0deg);
    }
    50% {
        stroke-dasharray: 4.69rem 6.25rem;
        transform: rotate(180deg);
    }
    100% {
        stroke-dasharray: 0.01rem 6.25rem;
        transform: rotate(360deg);
    }
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: var(--font-weight-semibold);
    color: #1A90B0;
    font-size: var(--font-size-caption);
}

.loading-progress-text:after {
    content: "Loading...";
}

/* ========== ERROR UI ========== */
#blazor-error-ui {
    background: #ef4444;
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: none;
    font-size: var(--font-size-body2);
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-xl);
    border-top: 2px solid rgba(255, 255, 255, 0.2);
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-h5);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

#blazor-error-ui .dismiss:hover {
    opacity: 1;
}

#blazor-error-ui .reload {
    color: white;
    text-decoration: underline;
    margin-left: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
}

#blazor-error-ui .reload:hover {
    text-decoration: none;
}

/* ========== SMOOTH SCROLLING ========== */
html {
    scroll-behavior: smooth;
}

/* ========== SELECTION ========== */
::selection {
    background-color: rgba(26, 144, 176, 0.2);
    color: inherit;
}

::-moz-selection {
    background-color: rgba(26, 144, 176, 0.2);
    color: inherit;
}