/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Variables */
:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --text-color: #212121;
    --text-color-light: #5f6368;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --spacing-unit: 8px;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    
    --font-family-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-family-secondary: 'Inter', system-ui, -apple-system, sans-serif;
}

/* Typography */
body {
    font-family: var(--font-family-primary);
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-secondary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-unit);
    color: var(--text-color);
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 3);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

p {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

/* Layout */
.header-content,
main section,
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 3);
}

section {
    margin-bottom: calc(var(--spacing-unit) * 6);
}

/* Header */
header {
    padding: calc(var(--spacing-unit) * 2) 0;
    color: white;
    transition: background-color var(--transition-speed);
}

.header-content {
    min-height: 20vh;
    display: grid;
    place-items: center;
    text-align: center;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: calc(var(--spacing-unit) * 2);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    background: linear-gradient(to right, #ffffff, rgba(255, 255, 255, 0.8));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.5rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Color Display */
.color-picker-container {
    margin: calc(var(--spacing-unit) * 4) auto;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: calc(var(--spacing-unit) * 6) 0;
    background: var(--card-background);
    border-radius: calc(var(--border-radius) * 2);
    box-shadow: 0 4px 6px var(--shadow-color),
                0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.color-picker-description {
    max-width: 600px;
    margin: 0 auto calc(var(--spacing-unit) * 4);
    color: var(--text-color);
    font-size: 1.25rem;
    line-height: 1.6;
    opacity: 0.9;
}

.color-form {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.color-input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 3);
    background: var(--background-color);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
}

.color-input-group label {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: 1.1rem;
}

.color-picker {
    width: 150px;
    height: 50px;
    padding: 0;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.2s ease;
}

.color-picker:hover {
    transform: scale(1.05);
}

.validate-button {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
    font-weight: 600;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1.1rem;
    letter-spacing: 0.025em;
    margin-top: calc(var(--spacing-unit) * 2);
}

.validate-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    background-color: var(--secondary-color);
}

.color-preview {
    width: 100%;
    min-height: 300px;
    border-radius: calc(var(--border-radius) * 2);
    box-shadow: 0 10px 30px var(--shadow-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin-top: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 4);
    border: 1px solid var(--border-color);
}

.preview-content {
    text-align: center;
}

.preview-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.hex-code {
    font-family: monospace;
    font-size: 1.6rem;
    margin-bottom: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    background: rgba(255, 255, 255, 0.1);
    border-radius: calc(var(--border-radius) / 2);
    display: inline-block;
    backdrop-filter: blur(4px);
}

.preview-description {
    font-size: 1.2rem;
    max-width: 500px;
    margin: 0 auto;
    opacity: 0.95;
    line-height: 1.6;
}

.color-display {
    margin-top: calc(var(--spacing-unit) * 6);
}

.color-main-display {
    height: 300px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px var(--shadow-color);
    transition: all var(--transition-speed);
    overflow: hidden;
    position: relative;
}

.color-display-info {
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    text-align: center;
    max-width: 80%;
}

.color-display-info h2 {
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: 2.5rem;
}

.color-display-info h2::after {
    display: none;
}

/* Color Search */
.color-search {
    margin-top: calc(var(--spacing-unit) * 4);
}

.search-container {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
    justify-content: center;
}

.search-container form {
    flex: 1;
    min-width: 300px;
}

.input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.input-group label {
    margin-bottom: var(--spacing-unit);
    font-weight: 500;
}

.input-with-hash {
    position: relative;
    display: flex;
    align-items: center;
}

.hash-symbol {
    position: absolute;
    left: calc(var(--spacing-unit) * 1.5);
    font-weight: bold;
    font-size: 1.1rem;
}

input[name="hex"] {
    padding-left: calc(var(--spacing-unit) * 3.5);
}

input {
    padding: calc(var(--spacing-unit) * 1.5);
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-unit);
    background-color: var(--card-background);
    transition: all var(--transition-speed);
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

button {
    padding: calc(var(--spacing-unit) * 1.5);
    font-size: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
}

button:hover {
    background-color: #3367d6;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Color Information */
.color-info-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.color-card {
    background-color: var(--card-background);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: all var(--transition-speed);
}

.color-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px var(--shadow-color);
}

.color-card h3 {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-unit);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.large-value {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: var(--spacing-unit);
}

.notation {
    font-family: monospace;
    background-color: rgba(0, 0, 0, 0.05);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius);
    margin-top: calc(var(--spacing-unit) * 2);
    font-size: 0.9rem;
}

/* Harmony */
.harmony-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 3);
}

.harmony-group {
    background-color: var(--card-background);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.harmony-colors {
    display: flex;
    gap: var(--spacing-unit);
    height: 100px;
}

.harmony-color {
    flex: 1;
    border-radius: var(--border-radius);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: var(--spacing-unit);
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.harmony-color span {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-family: monospace;
}

/* Palette */
.palette-container {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 1);
}

.palette-color {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow-color);
    position: relative;
    transition: all var(--transition-speed);
}

.palette-color:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.palette-tooltip {
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-color);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity var(--transition-speed);
    pointer-events: none;
    font-family: monospace;
    white-space: nowrap;
}

.palette-tooltip::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px 6px 0;
    border-style: solid;
    border-color: var(--text-color) transparent transparent;
}

.palette-color:hover .palette-tooltip {
    opacity: 1;
}

/* Accessibility */
.accessibility-container {
    background-color: var(--card-background);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.contrast-check {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
    align-items: center;
}

.contrast-square {
    width: 120px;
    height: 120px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.contrast-text {
    font-size: 2rem;
    font-weight: bold;
}

.white-text {
    color: white;
}

.black-text {
    color: black;
}

.contrast-info {
    flex: 1;
    min-width: 300px;
}

.contrast-info p {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.contrast-recommendation {
    margin-top: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 2);
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius);
}

/* Psychology */
.psychology-container {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
}

.psychology-card {
    flex: 1;
    min-width: 300px;
    background-color: var(--card-background);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.psychology-content {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) * 3);
}

.psychology-meanings, .psychology-industries {
    flex: 1;
    min-width: 250px;
}

.psychology-card ul {
    padding-left: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.psychology-card li {
    margin-bottom: var(--spacing-unit);
}

/* Educational Section */
.educational-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
}

.educational-block {
    background-color: var(--card-background);
    padding: calc(var(--spacing-unit) * 3);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.educational-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.educational-item {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.educational-item h4 {
    margin-bottom: var(--spacing-unit);
    color: var(--primary-color);
}

/* Footer */
footer {
    background: #111827;
    color: #fff;
    padding-top: calc(var(--spacing-unit) * 6);
    margin-top: calc(var(--spacing-unit) * 8);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 3);
}

.legal-content {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.8;
}

.legal-content h3 {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: 1.1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: calc(var(--spacing-unit) * 1);
}

.legal-content p {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.legal-content strong {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.footer-bottom {
    background-color: #0f172a;
    padding: calc(var(--spacing-unit) * 3);
    text-align: center;
    margin-top: calc(var(--spacing-unit) * 4);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Utility Classes */
.light-text {
    color: #fff;
}

.dark-text {
    color: #212121;
}

.light-color .light-text {
    color: #212121;
}

.light-color .dark-text {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-unit: 6px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .header-content,
    main section,
    .footer-content {
        padding: calc(var(--spacing-unit) * 2);
    }

    .color-main-display {
        height: 200px;
    }

    .contrast-check {
        justify-content: center;
    }

    .contrast-info {
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-unit: 4px;
    }

    .header-content {
        padding: calc(var(--spacing-unit) * 2);
    }

    h1 {
        font-size: 1.75rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .color-display-info h2 {
        font-size: 1.75rem;
    }

    .palette-container {
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.color-card, .harmony-group, .psychology-card, .educational-block {
    animation: slideUp 0.5s ease-out forwards;
}

section {
    animation: fadeIn 0.8s ease-out forwards;
}