/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Swiss Modernism Design System */
:root {
    /* Primary Palette – Elon University */
    --color-burgundy: #73000A;
    --color-burgundy-dark: #95000D;
    --color-burgundy-soft: #84000B;

    --color-gold: #B59A57;
    --color-gold-soft: #D4C59E;
    --color-gold-muted: #C5AF7A;

    /* Secondary Accents */
    --color-accent-amber: #DDA510;
    --color-accent-blue: #527B82;
    --color-accent-olive: #788A38;

    /* Warm Grays */
    --color-gray-900: #2D2926;
    --color-gray-700: #4A3F39;
    --color-gray-500: #72665F;
    --color-gray-300: #C1B6AC;
    --color-gray-100: #F2ECE4;

    /* Backgrounds */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8F1E8;
    --color-bg-tertiary: #fdfdfc;

    /* Semantic Colors */
    --color-text-primary: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-700);
    --color-text-muted: var(--color-gray-500);

    /* Spacing Scale (8px base unit) */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 96px;

    /* Typography Scale (1.25 ratio) */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 25px;
    --font-size-2xl: 31px;
    --font-size-3xl: 39px;
    --font-size-4xl: 49px;
    --font-size-5xl: 61px;

    /* Border Radius */
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'SF Pro Display', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    line-height: 1.6;
    padding: 0;
    font-size: var(--font-size-base);
}

.ambient-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    opacity: 0.6;
    background:
        radial-gradient(circle at 12% 18%, rgba(181, 154, 87, 0.22), transparent 38%),
        radial-gradient(circle at 78% 14%, rgba(149, 0, 13, 0.16), transparent 54%),
        radial-gradient(circle at 52% 84%, rgba(221, 165, 16, 0.12), transparent 62%);
}

.ambient-canvas-hidden {
    display: none;
}

/* Elon Banner */
.elon-banner {
    background: linear-gradient(135deg, var(--color-burgundy) 0%, var(--color-burgundy-dark) 100%);
    color: white;
    width: 100%;
    padding: 12px var(--space-lg);
    position: sticky;
    top: 0;
    z-index: 200;
    transform: translateY(0);
    transition: box-shadow 0.4s ease, background 0.4s ease;
    border-bottom: 1px solid rgba(212, 197, 158, 0.32);
    will-change: transform, box-shadow;
}

body.banner-stuck .elon-banner {
    box-shadow: 0 18px 32px rgba(0, 0, 0, 0.18);
    background: linear-gradient(135deg, rgba(115, 0, 10, 0.98) 0%, rgba(149, 0, 13, 0.92) 100%);
    backdrop-filter: blur(10px);
}

.banner-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
}

.banner-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: var(--space-sm);
}

.banner-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex: 0 0 auto;
}

.logo-link {
    display: block;
}

.elon-logo-img {
    max-width: 220px;
    height: auto;
}

.banner-title {
    font-size: var(--font-size-xl);
    font-weight: 500;
    letter-spacing: 0.015em;
    text-align: right;
    color: white;
    margin-left: auto;
    line-height: 1.2;
}

.banner-controls {
    width: 100%;
    margin-top: var(--space-xs);
}

@media (max-width: 640px) {
    .elon-banner {
        padding: var(--space-sm);
    }

    .banner-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .banner-title {
        text-align: left;
        margin-left: 0;
        width: 100%;
    }

    .banner-controls {
        margin-top: var(--space-sm);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
}

/* Header Styles */
header {
    text-align: left;
    margin-bottom: var(--space-lg);
    padding: var(--space-lg) 0;
}

.condensed-header {
    padding: var(--space-lg) 0 var(--space-md);
    margin-bottom: var(--space-lg);
}

.header-content {
    max-width: 900px;
    margin: 0;
}

h1 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 820px;
    margin: 0 0 var(--space-sm) 0;
    line-height: 1.6;
}

/* Search and Filter Styles */
.search-filter {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(181, 154, 87, 0.35);
    border-radius: calc(var(--radius) * 1.6);
    padding: var(--space-sm);
    backdrop-filter: blur(14px);
    box-shadow: 0 18px 34px rgba(115, 0, 10, 0.12);
}

@media (min-width: 640px) {
    .search-filter {
        flex-direction: row;
        align-items: center;
        gap: var(--space-sm);
        padding: var(--space-sm) var(--space-md);
    }
}

/* Mission Statement Styles */
.mission-statement {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    border-top: 1px solid rgba(181, 154, 87, 0.2);
    padding-top: var(--space-sm);
    margin-top: var(--space-sm);
    line-height: 1.5;
}

.mission-label {
    color: var(--color-burgundy);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-right: var(--space-xs);
}

/* Responsive header adjustments */
@media (max-width: 768px) {
    h1 {
        font-size: 28px;
    }

    .subtitle {
        font-size: 14px;
        line-height: 1.5;
    }

    .mission-statement {
        font-size: 12px;
    }

    .condensed-header {
        padding: var(--space-md) 0 var(--space-sm);
    }
}

@media (min-width: 640px) {
    .search-filter {
        justify-content: flex-start;
    }
}

.search-box {
    position: relative;
    flex: 1 1 320px;
    max-width: 100%;
}

.search-box input {
    width: 100%;
    padding: 12px 44px 12px 44px;
    border: none;
    border-radius: calc(var(--radius) * 1.4);
    font-size: var(--font-size-sm);
    outline: none;
    background: rgba(255, 255, 255, 0.95);
    color: var(--color-gray-900);
    box-shadow: 0 10px 22px rgba(115, 0, 10, 0.08);
    transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

.search-box input:focus {
    box-shadow: 0 0 0 2px rgba(181, 154, 87, 0.45), 0 18px 32px rgba(115, 0, 10, 0.18);
    transform: translateY(-1px);
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gold-muted);
}

.search-box .clear-search-btn {
    left: auto;
    right: 12px;
    color: var(--color-gray-500);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, color 0.2s ease;
    font-size: var(--font-size-sm);
}

.search-box .clear-search-btn.visible {
    opacity: 0.6;
    visibility: visible;
}

.search-box .clear-search-btn:hover {
    opacity: 1;
    color: var(--color-burgundy);
}

.category-filter select {
    padding: 12px var(--space-sm);
    border: none;
    border-radius: calc(var(--radius) * 1.4);
    background-color: rgba(255, 255, 255, 0.94);
    font-size: var(--font-size-sm);
    outline: none;
    min-width: 180px;
    cursor: pointer;
    box-shadow: 0 10px 22px rgba(115, 0, 10, 0.08);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.category-filter select:focus {
    box-shadow: 0 0 0 2px rgba(181, 154, 87, 0.45), 0 18px 32px rgba(115, 0, 10, 0.18);
    transform: translateY(-1px);
}

@media (min-width: 640px) {
    .category-filter {
        flex: 0 0 220px;
    }
}

.category-filter {
    width: 100%;
}

@media (max-width: 639px) {
    .banner-clear {
        width: 100%;
        margin-top: var(--space-xs);
    }
}

@media (min-width: 640px) {
    .banner-clear {
        flex: 0 0 auto;
        margin-left: var(--space-sm);
    }
}

/* Tools Grid Styles */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-sm);
}

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

@media (min-width: 768px) {
    .tools-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

/* Tool Card Styles */
.tool-card {
    background-color: var(--color-bg-primary);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(115, 0, 10, 0.06), 0 12px 26px rgba(115, 0, 10, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 22px rgba(115, 0, 10, 0.12), 0 20px 36px rgba(115, 0, 10, 0.12);
}

.tool-content {
    padding: var(--space-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.tool-icon {
    background: linear-gradient(135deg, rgba(181, 154, 87, 0.22), rgba(115, 0, 10, 0.08));
    width: 64px;
    height: 64px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0;
    border: 1px solid rgba(181, 154, 87, 0.35);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.tool-icon i {
    font-size: 28px;
}

.tool-img {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.tool-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 0;
    text-align: center;
    color: var(--color-text-primary);
}

.tool-description {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: 0;
    max-width: 26ch;
}

.tool-link {
    margin-top: auto;
    padding: 0 var(--space-md) var(--space-md);
}

.btn {
    display: block;
    width: 100%;
    padding: 12px var(--space-sm);
    background: linear-gradient(135deg, var(--color-burgundy) 0%, var(--color-burgundy-dark) 100%);
    color: white;
    text-align: center;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    border-radius: var(--radius);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 12px 28px rgba(115, 0, 10, 0.18);
}

.btn:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, var(--color-burgundy-dark) 0%, var(--color-burgundy-soft) 100%);
    box-shadow: 0 16px 32px rgba(115, 0, 10, 0.24);
}

.btn:focus-visible {
    outline: 2px solid rgba(181, 154, 87, 0.85);
    outline-offset: 2px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) 0;
    display: none;
}

.empty-state p {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-sm);
}

.banner-clear {
    padding: 12px var(--space-md);
    border-radius: calc(var(--radius) * 1.4);
    border: 1px solid rgba(212, 197, 158, 0.6);
    background: rgba(181, 154, 87, 0.18);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.banner-clear:hover {
    background: rgba(181, 154, 87, 0.28);
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.18);
}

.banner-clear:active {
    transform: translateY(0);
    box-shadow: none;
}

.banner-clear:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.empty-state button {
    background-color: var(--color-gold-soft);
    color: var(--color-gray-900);
    padding: var(--space-xs) var(--space-sm);
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.empty-state button:hover {
    background-color: var(--color-gold-muted);
}

/* Tool Colors – Elon Brand Accents */
.color-primary i,
.color-red i {
    color: var(--color-burgundy);
}

.color-accent i,
.color-yellow i,
.color-orange i {
    color: var(--color-accent-amber);
}

.color-muted i,
.color-gray i {
    color: var(--color-gray-500);
}

.color-indigo i,
.color-blue i,
.color-cyan i,
.color-teal i {
    color: var(--color-accent-blue);
}

.color-green i {
    color: var(--color-accent-olive);
}

.color-purple i,
.color-pink i,
.color-violet i {
    color: var(--color-gold-muted);
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-burgundy) 0%, var(--color-burgundy-dark) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 24px rgba(115, 0, 10, 0.18);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: linear-gradient(135deg, var(--color-accent-amber) 0%, var(--color-gold) 100%);
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(115, 0, 10, 0.22);
}

.scroll-to-top:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.scroll-to-top i {
    font-size: 20px;
}

/* Smooth scrolling for the entire page */
html {
    scroll-behavior: smooth;
}

/* Developer Credits Footer */
.developer-credits {
    text-align: center;
    margin-top: var(--space-2xl);
    padding: var(--space-xl) var(--space-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.developer-credits hr {
    border: none;
    border-top: 1px solid rgba(181, 154, 87, 0.3);
    margin-bottom: var(--space-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.developer-credits p {
    margin: var(--space-xs) 0;
    line-height: 1.6;
}

.developer-credits a {
    color: var(--color-burgundy);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.developer-credits a:hover {
    color: var(--color-burgundy-dark);
    text-decoration: underline;
}