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

:root {
    /* Primary Colors */
    --color-navy: #1F2139;
    --color-deep-blue: #2D3561;

    /* Accent Colors */
    --color-vibrant-orange: #FF6B35;
    --color-sunny-yellow: #FFD700;
    --color-bright-orange: #FF8C00;

    /* Interactive Colors */
    --color-sky-blue: #87CEEB;
    --color-light-blue: #ADD8E6;
    --color-bright-blue: #5B8DEF;

    /* Neutral Scale */
    --color-off-white: #F5F7FB;
    --color-white: #FFFFFF;
    --color-black: #000000;

    /* Surface & Borders */
    --color-light-gray: #E8EEF5;
    --color-medium-gray: #D1D9E6;
    --color-dark-gray: #4A4F6E;

    /* Semantic / Status */
    --color-success: #10B981;
    --color-warning: #FF8C00;
    --color-error: #EF4444;

    /* Spacing System */
    --space-4: 4px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-24: 24px;
    --space-32: 32px;
    --space-48: 48px;
    --space-64: 64px;
    --space-80: 80px;
    --space-96: 96px;

    /* Border Radius Scale */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-pill: 9999px;

    /* Elevation / Shadows */
    --shadow-1: 0px 2px 8px rgba(31, 33, 57, 0.08);
    --shadow-2: 0px 4px 12px rgba(31, 33, 57, 0.12);
    --shadow-3: 0px 8px 16px rgba(31, 33, 57, 0.16);
    --shadow-4: 0px 12px 24px rgba(31, 33, 57, 0.2);
    --shadow-5: 0px 16px 32px rgba(31, 33, 57, 0.24);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-secondary: Georgia, 'Times New Roman', serif;
    --font-mono: 'Courier New', Courier, monospace;
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-off-white);
    color: var(--color-black);
    line-height: 1.6;
    font-size: 16px;
}

/* Typography Hierarchy */
.display-hero {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.5px;
    color: var(--color-navy);
}

h1, .h1 {
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.3px;
    color: var(--color-navy);
}

h2, .h2 {
    font-size: 28px;
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: -0.2px;
    color: var(--color-navy);
}

h3, .h3 {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-navy);
}

.body-large {
    font-size: 18px;
    line-height: 1.6;
    letter-spacing: 0.3px;
}

.body-regular {
    font-size: 16px;
    line-height: 1.6;
    letter-spacing: 0.3px;
}

.body-small {
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0.2px;
}

.caption {
    font-size: 12px;
    line-height: 1.4;
    letter-spacing: 0.1px;
}

code, .code {
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.5;
    background: var(--color-light-gray);
    padding: 2px 4px;
    border-radius: var(--radius-xs);
}

/* Layout Elements */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-32);
}

@media (max-width: 1023px) {
    .container {
        padding: 0 var(--space-16);
    }
}

@media (max-width: 639px) {
    .container {
        padding: 0 var(--space-12);
    }
}

section {
    padding: var(--space-64) 0;
}

@media (max-width: 768px) {
    section {
        padding: var(--space-48) 0;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 200ms ease;
    border: none;
    text-decoration: none;
    font-family: inherit;
    gap: var(--space-8);
}

.btn-primary {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-deep-blue);
    box-shadow: 0px 4px 12px rgba(31, 33, 57, 0.2);
}

.btn-primary:active:not(:disabled) {
    background-color: #1A1C2E;
    box-shadow: inset 0px 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: var(--color-off-white);
    color: var(--color-navy);
    border: 2px solid var(--color-medium-gray);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-light-gray);
    border-color: var(--color-bright-blue);
    box-shadow: 0px 4px 12px rgba(91, 141, 239, 0.1);
}

.btn-secondary:active:not(:disabled) {
    background-color: var(--color-medium-gray);
    border-color: var(--color-deep-blue);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-vibrant-orange);
    border: 2px solid var(--color-vibrant-orange);
}

.btn-ghost:hover:not(:disabled) {
    background-color: rgba(255, 107, 53, 0.1);
    border-color: var(--color-bright-orange);
    color: var(--color-bright-orange);
}

.btn-ghost:active:not(:disabled) {
    background-color: rgba(255, 107, 53, 0.2);
}

.btn:disabled {
    background-color: var(--color-medium-gray);
    color: #7F8BA8;
    cursor: not-allowed;
    border-color: transparent;
}

.btn-secondary:disabled {
    background-color: var(--color-off-white);
    border-color: var(--color-light-gray);
}

/* Cards */
.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    padding: var(--space-24);
    box-shadow: var(--shadow-1);
    transition: all 200ms ease;
}

.card:hover {
    box-shadow: var(--shadow-2);
    transform: translateY(-4px);
}

.card-elevated {
    border-color: var(--color-bright-blue);
    box-shadow: 0px 8px 24px rgba(91, 141, 239, 0.2);
}

.card-alert {
    background-color: rgba(255, 107, 53, 0.1);
    border: 2px solid var(--color-vibrant-orange);
    color: var(--color-navy);
}

/* Forms */
.form-group {
    margin-bottom: var(--space-24);
}

label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--space-8);
}

.input {
    width: 100%;
    background-color: var(--color-off-white);
    border: 1px solid var(--color-medium-gray);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 16px;
    color: var(--color-navy);
    transition: all 200ms ease;
    font-family: inherit;
}

.input::placeholder {
    color: #7F8BA8;
}

.input:hover {
    border-color: var(--color-bright-blue);
}

.input:focus {
    outline: none;
    background-color: var(--color-white);
    border-color: var(--color-bright-blue);
    border-width: 2px;
    box-shadow: 0px 0px 0px 4px rgba(91, 141, 239, 0.1);
}

.input-error {
    border-color: var(--color-error);
    border-width: 2px;
}

.input-error:focus {
    box-shadow: 0px 0px 0px 4px rgba(239, 68, 68, 0.1);
}

.helper-text {
    font-size: 12px;
    margin-top: var(--space-4);
    color: #7F8BA8;
}

.helper-text.success { color: var(--color-success); }
.helper-text.error { color: var(--color-error); }

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
}

.badge-primary { background-color: var(--color-navy); color: var(--color-white); }
.badge-success { background-color: var(--color-success); color: var(--color-white); }
.badge-warning { background-color: var(--color-warning); color: var(--color-white); }

/* Navigation */
.navbar {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-light-gray);
    padding: var(--space-16) var(--space-32);
    box-shadow: var(--shadow-1);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    color: var(--color-navy);
    font-weight: 500;
    padding: 8px 16px;
    text-decoration: none;
    transition: color 200ms ease;
    position: relative;
}

.nav-link:hover {
    color: var(--color-bright-orange);
}

.nav-link.active {
    color: var(--color-vibrant-orange);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 16px;
    right: 16px;
    height: 3px;
    background-color: var(--color-vibrant-orange);
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--color-light-gray);
    margin-bottom: var(--space-24);
}

.tab-item {
    padding: 16px 24px;
    color: #7F8BA8;
    font-weight: 500;
    cursor: pointer;
    transition: all 200ms ease;
    border-bottom: 3px solid transparent;
}

.tab-item:hover {
    color: var(--color-navy);
    background-color: var(--color-off-white);
}

.tab-item.active {
    color: var(--color-navy);
    border-bottom-color: var(--color-bright-blue);
    font-weight: 600;
}

/* Industrial Decorative Elements */
.wave-bg {
    position: relative;
    overflow: hidden;
}

.wave-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg, var(--color-sky-blue) 0%, transparent 100%);
    opacity: 0.1;
    border-radius: 0 0 100% 100%;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-24);
}

.color-swatch {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-1);
}

.swatch-fill {
    height: 120px;
}

.swatch-info {
    padding: var(--space-12);
    background: var(--color-white);
}

.swatch-name {
    font-weight: 600;
    display: block;
}

.swatch-hex {
    font-size: 12px;
    color: var(--color-dark-gray);
}