/**
 * MIT Technology Review Inspired Redesign
 * World-class UX with editorial sophistication
 */

/* ========================================
 * TYPOGRAPHY SYSTEM - NeueHaas Inspired
 * ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=IBM+Plex+Mono:wght@400;600&display=swap');

:root {
    /* Typography Scale - MIT Tech Review Exact */
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    /* Font Sizes - Fluid Typography (MIT TR values) */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px - captions */
    --text-base: 1rem;       /* 16px - body baseline */
    --text-lg: 1.125rem;     /* 18px - H4 desktop */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px - H3 mobile */
    --text-3xl: 1.75rem;     /* 28px - H2 mobile */
    --text-4xl: 2.25rem;     /* 36px - H2 desktop */
    --text-5xl: 3rem;        /* 48px - H1 mobile */
    --text-6xl: 5.5rem;      /* 88px - H1 desktop */

    /* Line Heights - MIT TR values */
    --leading-tight: 1.2;
    --leading-snug: 1.28571;    /* MIT TR figure captions */
    --leading-normal: 1.231;    /* MIT TR body baseline */
    --leading-relaxed: 1.625;
    --leading-loose: 1.75;

    /* Letter Spacing - MIT TR values */
    --tracking-tight: -0.055em;  /* H1 tracking */
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;

    /* Container & Spacing - MIT TR exact */
    --container-max: 80rem;      /* 1280px */
    --padding-mobile: 1.25rem;   /* 20px */
    --padding-tablet: 5rem;      /* 80px */
    --padding-desktop: 6.25rem;  /* 100px */

    /* Section Spacing - MIT TR */
    --space-section: 1.875rem;   /* 30px */
    --space-section-large: 3.125rem;  /* 50px */
}

/* ========================================
 * COLOR SYSTEM - MIT Tech Review Exact
 * ======================================== */

:root {
    /* MIT TR Core Colors */
    --mit-white: #ffffff;
    --mit-black: #000000;
    --mit-gray-light: #f3f3f3;      /* content sections */
    --mit-gray-medium: #ebecf0;     /* homepage bg */
    --mit-gray-border: #cccccc;     /* table borders */
    --mit-gray-dark: #444444;       /* secondary text */
    --mit-overlay: #302c2c;         /* dark overlay */

    /* MIT TR Accent Teal */
    --mit-teal-primary: #a0f5e9;    /* buttons */
    --mit-teal-hover: #cffaf4;      /* active state */
    --mit-teal-highlight: #89f0e1;  /* theme variant */

    /* MIT TR Link Colors */
    --mit-link-hover: #256f94;      /* 125ms transition */

    /* MIT TR Theme Variants */
    --mit-navy: #14263e;
    --mit-forest: #1c3b16;
    --mit-burgundy: #400a26;
    --mit-plum: #29143e;

    /* Shadow System - MIT TR */
    --shadow-mobile: 0 3px 12px rgba(0, 0, 0, 0.15);
    --shadow-desktop: 0 7px 25px rgba(0, 0, 0, 0.12);
}

/* Theme Variables - Use existing black/white system from variables.css
   DO NOT override --bg-primary, --text-primary etc as they're defined globally */

/* MIT-specific border colors that work with black/white theme */
:root {
    --mit-border-color: var(--border-subtle);
    --mit-border-color-strong: var(--border-medium);
}

html[data-theme="dark"],
[data-theme="dark"] {
    --mit-border-color: var(--border-subtle);
    --mit-border-color-strong: var(--border-medium);
}

/* ========================================
 * SPACING SYSTEM
 * ======================================== */

:root {
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-8: 2rem;         /* 32px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */
    --space-24: 6rem;        /* 96px */
}

/* ========================================
 * CONTAINER SYSTEM
 * ======================================== */

.mit-container {
    max-width: var(--container-max);  /* 80rem = 1280px */
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--padding-mobile);   /* 1.25rem = 20px */
    padding-right: var(--padding-mobile);
}

/* MIT TR Exact Breakpoints */
@media (min-width: 39.375rem) {  /* 630px - Tablet */
    .mit-container {
        padding-left: var(--padding-tablet);   /* 5rem = 80px */
        padding-right: var(--padding-tablet);
    }
}

@media (min-width: 60rem) {  /* 960px - Desktop */
    .mit-container {
        padding-left: var(--padding-desktop);  /* 6.25rem = 100px */
        padding-right: var(--padding-desktop);
    }
}

/* ========================================
 * TYPOGRAPHY COMPONENTS
 * ======================================== */

.mit-heading-1 {
    font-family: var(--font-display);
    font-size: clamp(var(--text-5xl), 6vw, var(--text-6xl));  /* 3rem → 5.5rem */
    font-weight: 700;
    line-height: var(--leading-tight);  /* 1.2 */
    letter-spacing: var(--tracking-tight);  /* -0.055em - MIT TR exact */
    color: var(--text-primary);
    margin-bottom: var(--space-section);  /* 1.875rem - MIT TR spacing */
}

.mit-heading-2 {
    font-family: var(--font-display);
    font-size: clamp(var(--text-3xl), 3vw, var(--text-4xl));  /* 1.75rem → 2.25rem */
    font-weight: 700;
    line-height: var(--leading-tight);  /* 1.2 */
    letter-spacing: var(--tracking-normal);
    color: var(--text-primary);
    margin-bottom: var(--space-section);  /* 1.875rem */
}

.mit-heading-3 {
    font-family: var(--font-display);
    font-size: clamp(var(--text-2xl), 2vw, var(--text-2xl));  /* 1.5rem → 2rem */
    font-weight: 700;
    line-height: var(--leading-tight);  /* 1.2 */
    color: var(--text-primary);
    margin-bottom: var(--space-section);  /* 1.875rem */
}

.mit-body {
    font-family: var(--font-body);
    font-size: var(--text-base);  /* 1rem = 16px */
    line-height: var(--leading-normal);  /* 1.231 - MIT TR baseline */
    color: var(--text-secondary);
}

.mit-body-lg {
    font-size: var(--text-lg);  /* 1.125rem = 18px */
    line-height: var(--leading-normal);  /* 1.231 */
    color: var(--text-secondary);
}

.mit-caption {
    font-size: var(--text-sm);  /* 0.875rem = 14px */
    line-height: var(--leading-snug);  /* 1.28571 - MIT TR caption value */
    color: var(--text-tertiary);
}

/* ========================================
 * CARD COMPONENTS - MIT Style
 * ======================================== */

.mit-card {
    background: var(--bg-elevated);
    border: 1px solid var(--mit-border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.mit-card:hover {
    border-color: var(--mit-border-color-strong);
    box-shadow: 0 8px 20px var(--shadow-color-15);
}

.mit-card-content {
    padding: var(--space-6);
}

.mit-card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--mit-border-color);
}

.mit-card-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    line-height: var(--leading-snug);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.mit-card-description {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--text-tertiary);
}

/* ========================================
 * BUTTON COMPONENTS
 * ======================================== */

.mit-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mit-button-primary {
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border-color: var(--button-primary-bg);
}

.mit-button-primary:hover {
    background: var(--primary-cyan-hover);
    border-color: var(--primary-cyan-hover);
    transform: translateY(-1px);
}

.mit-button-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--mit-border-color-strong);
}

.mit-button-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-primary);
}

.mit-button-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ========================================
 * GRID LAYOUTS
 * ======================================== */

.mit-grid {
    display: grid;
    gap: var(--space-8);
}

.mit-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.mit-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.mit-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

@media (min-width: 1024px) {
    .mit-grid-2 { grid-template-columns: repeat(2, 1fr); }
    .mit-grid-3 { grid-template-columns: repeat(3, 1fr); }
    .mit-grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ========================================
 * SECTION COMPONENTS
 * ======================================== */

.mit-section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
}

.mit-section-header {
    margin-bottom: var(--space-12);
    border-bottom: 2px solid var(--mit-border-color);
    padding-bottom: var(--space-6);
}

.mit-section-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    line-height: var(--leading-tight);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.mit-section-subtitle {
    font-size: var(--text-lg);
    color: var(--text-tertiary);
    line-height: var(--leading-normal);
}

/* ========================================
 * NAVIGATION - Fixed Header
 * ======================================== */

.mit-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--mit-border-color);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-mobile);  /* MIT TR shadow */
    transition: box-shadow 0.3s ease;
}

@media (min-width: 60rem) {
    .mit-header {
        box-shadow: var(--shadow-desktop);  /* Larger shadow on desktop */
    }
}

.mit-header-content {
    display: flex;
    flex-direction: column;  /* MIT TR stacks logo/menu */
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
    gap: var(--space-4);
}

@media (min-width: 60rem) {
    .mit-header-content {
        flex-direction: row;  /* Horizontal on desktop */
        gap: var(--space-8);
    }
}

.mit-logo {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}

.mit-nav {
    display: none;
}

@media (min-width: 1024px) {
    .mit-nav {
        display: flex;
        gap: var(--space-8);
    }
}

.mit-nav-link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: color 0.2s ease;
}

.mit-nav-link:hover {
    color: var(--text-primary);
}

/* ========================================
 * STATS DISPLAY
 * ======================================== */

.mit-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    padding: var(--space-8);
    background: var(--bg-secondary);
    border: 1px solid var(--mit-border-color);
    border-radius: 12px;
}

.mit-stat {
    text-align: center;
}

.mit-stat-number {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 700;
    line-height: 1;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.mit-stat-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

/* ========================================
 * ACCESSIBILITY & FOCUS STATES
 * ======================================== */

*:focus-visible {
    outline: 3px solid var(--primary-cyan);
    outline-offset: 2px;
}

/* ========================================
 * RESPONSIVE UTILITIES
 * ======================================== */

@media (max-width: 640px) {
    .mit-grid {
        gap: var(--space-6);
    }

    .mit-section {
        padding-top: var(--space-12);
        padding-bottom: var(--space-12);
    }
}

/* ========================================
 * FOOTER REDESIGN - MIT Tech Style
 * ======================================== */

.quantum-footer {
    margin-top: var(--space-20);
    padding: var(--space-16) 0 var(--space-8) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--mit-border-color);
}

.footer-container {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (min-width: 1024px) {
    .footer-container {
        padding: 0 var(--space-20);
    }
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-12);
    margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.footer-subtitle {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-bottom: var(--space-2);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
    line-height: var(--leading-relaxed);
}

.footer-link:hover {
    color: var(--text-primary);
    transform: translateX(4px);
}

.footer-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.footer-stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.footer-stat-number {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.footer-stat-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.section-divider {
    height: 1px;
    background: var(--mit-border-color);
    margin: var(--space-12) 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    padding-top: var(--space-6);
}

@media (max-width: 640px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

.footer-copyright {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    line-height: var(--leading-relaxed);
}

.footer-copyright a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.footer-copyright a:hover {
    color: var(--text-primary);
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

@media (max-width: 640px) {
    .footer-legal {
        flex-direction: column;
        gap: var(--space-3);
    }
}

.footer-legal-link {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ========================================
 * COMPANY CARDS REDESIGN - MIT Tech Style
 * ======================================== */

.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-6);
    margin: var(--space-12) 0;
}

@media (max-width: 640px) {
    .companies-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
}

.company-card {
    background: var(--bg-elevated);
    border: 1px solid var(--mit-border-color);
    border-radius: 12px;
    padding: var(--space-6);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.company-card:hover {
    border-color: var(--mit-border-color-strong);
    box-shadow: 0 8px 20px var(--shadow-color-15);
    transform: translateY(-2px);
}

.company-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-3);
}

.company-card-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    line-height: var(--leading-snug);
    color: var(--text-primary);
    margin: 0;
}

.company-card-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.company-card-title a:hover {
    color: var(--text-secondary);
}

.company-card-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.company-card-location,
.company-card-founded {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.company-card-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
    margin: 0;
}

.company-card-categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.company-card-category {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--mit-border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    font-weight: 600;
}

.company-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-3);
    border-top: 1px solid var(--mit-border-color);
}

.company-card-link {
    font-size: var(--text-sm);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: transform 0.2s ease;
}

.company-card-link:hover {
    transform: translateX(4px);
}

/* ========================================
 * SEARCH BAR - Standard Search Component
 * ======================================== */

.mit-search-container {
    max-width: 600px;
    margin: var(--space-8) auto;
    position: relative;
}

.mit-search-input {
    width: 100%;
    padding: var(--space-4) var(--space-6) var(--space-4) var(--space-12);
    font-family: var(--font-body);
    font-size: var(--text-base);
    background: var(--bg-elevated);
    border: 2px solid var(--mit-border-color);
    border-radius: 50px;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.mit-search-input:focus {
    outline: none;
    border-color: var(--text-primary);
    box-shadow: 0 4px 12px var(--shadow-color-15);
}

.mit-search-input::placeholder {
    color: var(--text-tertiary);
}

.mit-search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

/* ========================================
 * FILTERS - Standard Filter Pills
 * ======================================== */

.mit-filters-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: var(--space-6) 0;
}

.mit-filter-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 600;
    background: var(--bg-secondary);
    border: 2px solid var(--mit-border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.mit-filter-pill:hover {
    border-color: var(--text-primary);
    background: var(--bg-elevated);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.mit-filter-pill.active {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.mit-filter-pill.active:hover {
    opacity: 0.9;
}

/* ========================================
 * BREADCRUMBS - Standard Navigation
 * ======================================== */

.mit-breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin: var(--space-4) 0;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.mit-breadcrumb-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.mit-breadcrumb-link:hover {
    color: var(--text-primary);
}

.mit-breadcrumb-separator {
    color: var(--text-tertiary);
}

.mit-breadcrumb-current {
    color: var(--text-primary);
    font-weight: 600;
}

/* ========================================
 * PAGINATION - Standard Page Navigation
 * ======================================== */

.mit-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin: var(--space-12) 0;
}

.mit-pagination-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    background: var(--bg-elevated);
    border: 1px solid var(--mit-border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.mit-pagination-button:hover:not(:disabled):not(.active) {
    border-color: var(--text-primary);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.mit-pagination-button.active {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
    cursor: default;
}

.mit-pagination-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.mit-pagination-ellipsis {
    color: var(--text-tertiary);
    padding: 0 var(--space-2);
}

/* ========================================
 * TABS - Standard Tab Navigation
 * ======================================== */

.mit-tabs-container {
    border-bottom: 1px solid var(--mit-border-color);
    margin-bottom: var(--space-8);
}

.mit-tabs {
    display: flex;
    gap: var(--space-6);
    overflow-x: auto;
    scrollbar-width: none;
}

.mit-tabs::-webkit-scrollbar {
    display: none;
}

.mit-tab {
    position: relative;
    padding: var(--space-3) var(--space-2);
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-tertiary);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.mit-tab:hover {
    color: var(--text-secondary);
}

.mit-tab.active {
    color: var(--text-primary);
}

.mit-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--text-primary);
}

/* ========================================
 * BADGES - Standard Status Indicators
 * ======================================== */

.mit-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    border-radius: 4px;
    line-height: 1;
}

.mit-badge-neutral {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--mit-border-color);
}

.mit-badge-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.mit-badge-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--mit-border-color-strong);
}

/* ========================================
 * TOOLTIPS - Standard Information Display
 * ======================================== */

.mit-tooltip-trigger {
    position: relative;
    cursor: help;
}

.mit-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    line-height: var(--leading-normal);
    background: var(--bg-elevated);
    border: 1px solid var(--mit-border-color);
    border-radius: 6px;
    color: var(--text-primary);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 100;
}

.mit-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--mit-border-color);
}

.mit-tooltip-trigger:hover .mit-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

/* ========================================
 * ALERTS - Standard Message Display
 * ======================================== */

.mit-alert {
    padding: var(--space-4) var(--space-6);
    border-radius: 8px;
    border: 1px solid var(--mit-border-color);
    margin: var(--space-4) 0;
}

.mit-alert-info {
    background: var(--bg-secondary);
    border-color: var(--mit-border-color);
}

.mit-alert-title {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.mit-alert-message {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

/* ========================================
 * LOADING STATES - Standard Spinners
 * ======================================== */

.mit-loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--mit-border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: mit-spin 0.6s linear infinite;
}

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

.mit-loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-12);
    color: var(--text-tertiary);
}

.mit-loading-text {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* ========================================
 * SKELETON LOADERS - Standard Content Placeholders
 * ======================================== */

.mit-skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: mit-skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes mit-skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.mit-skeleton-text {
    height: 1em;
    margin: var(--space-2) 0;
}

.mit-skeleton-heading {
    height: 2em;
    margin: var(--space-3) 0;
}

.mit-skeleton-card {
    height: 200px;
    border-radius: 12px;
}

/* ========================================
 * ACCESSIBILITY - REDUCED MOTION
 * ======================================== */

@media (prefers-reduced-motion: reduce) {
    .company-card,
    .mit-card,
    .mit-button,
    .footer-link,
    .footer-legal-link,
    .company-card-link,
    .mit-filter-pill,
    .mit-pagination-button,
    .mit-tab,
    .mit-tooltip {
        transition: none !important;
        transform: none !important;
    }

    .company-card:hover,
    .mit-card:hover,
    .mit-filter-pill:hover {
        transform: none !important;
    }

    .mit-loading-spinner,
    .mit-skeleton {
        animation: none !important;
    }
}

/* ========================================
 * PRINT STYLES
 * ======================================== */

@media print {
    .mit-header,
    .mit-button,
    .floating-ring,
    .theme-toggle-container {
        display: none;
    }

    .mit-card,
    .company-card {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }

    .quantum-footer {
        page-break-before: always;
    }
}