/* ==========================================
   CSS Variables - RLWRLD Brand Colors
   ========================================== */
:root {
    /* Brand Colors */
    --primary-color: #50EACE;
    --primary-text: #23B399;
    --background: #0a0a0a;
    --background-secondary: #141414;
    --border-color: #2a2a2a;
    --white: #FFFFFF;
    --black: #000000;

    /* Dark Theme Text Colors */
    --text-primary: #e8e8e8;
    --text-secondary: #b8b8b8;
    --text-light: #8a8a8a;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 1.125rem;
    --font-size-sm: 1rem;
    --font-size-lg: 1.25rem;
    --line-height: 1.8;

    /* Layout */
    --max-width-desktop: 1200px;
    --max-width-tablet: 90%;
    --max-width-mobile: 95%;
    --header-height: 70px;

    /* Transitions */
    --transition-speed: 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--text-primary);
    background-color: var(--background);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

img:not([src]),
img[src=""] {
    background-color: var(--black);
}

a {
    color: inherit;
    text-decoration: none;
}

strong {
    font-weight: 600;
    color: var(--primary-text);
}

/* ==========================================
   Header
   ========================================== */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(10, 10, 10, 0.98);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    height: var(--header-height);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    padding: 0 var(--spacing-md);
}

.logo-img {
    height: 36px;
    width: auto;
    transition: opacity var(--transition-speed);
}

@media (hover: hover) {
    .logo-img:hover {
        opacity: 0.8;
    }
}

/* ==========================================
   Container
   ========================================== */
.container {
    max-width: var(--max-width-desktop);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
        padding: 0 var(--spacing-2xl);
    }
}

@media (min-width: 1200px) and (max-width: 1399px) {
    .container {
        max-width: 1200px;
        padding: 0 var(--spacing-xl);
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .container {
        max-width: 960px;
        padding: 0 var(--spacing-lg);
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .container {
        max-width: var(--max-width-tablet);
        padding: 0 var(--spacing-md);
    }
}

/* ==========================================
   Hero
   ========================================== */
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   Article
   ========================================== */
.article {
    background-color: var(--background);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--background-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo-img {
    height: 28px;
    width: auto;
    opacity: 0.7;
}

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* ==========================================
   CTA Buttons
   ========================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-xl);
    background-color: var(--primary-color);
    color: var(--background);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed);
    text-align: center;
}

@media (hover: hover) {
    .btn:hover {
        background-color: var(--primary-text);
        transform: translateY(-2px);
        box-shadow: 0 8px 16px rgba(80, 234, 206, 0.3);
    }
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* ==========================================
   Form Elements
   ========================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(80, 234, 206, 0.1);
}

/* Override browser autofill background on dark theme */
.form-input:-webkit-autofill,
.form-input:-webkit-autofill:hover,
.form-select:-webkit-autofill,
.form-select:-webkit-autofill:hover {
    -webkit-box-shadow: 0 0 0 1000px var(--background) inset;
    -webkit-text-fill-color: var(--text-primary);
    caret-color: var(--text-primary);
    transition: background-color 5000s ease-in-out 0s;
}

.form-input:-webkit-autofill:focus,
.form-select:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 1000px var(--background) inset, 0 0 0 3px rgba(80, 234, 206, 0.1);
    -webkit-text-fill-color: var(--text-primary);
    caret-color: var(--text-primary);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 991px) {
    :root {
        --spacing-3xl: 4rem;
        --spacing-2xl: 3rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 1rem;
        --font-size-sm: 0.875rem;
        --font-size-lg: 1.125rem;
        --spacing-3xl: 3rem;
        --spacing-2xl: 2.5rem;
        --spacing-xl: 2rem;
    }

    .container {
        max-width: var(--max-width-mobile);
        padding: 0 var(--spacing-md);
    }

    .header-content {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-xl: 1.5rem;
        --spacing-lg: 1.25rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .header-content {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 0.9375rem;
        --header-height: 60px;
    }

    .logo-img {
        height: 24px;
    }

    .header-content {
        height: 60px;
    }
}

@media (max-width: 375px) {
    .container {
        padding: 0 1rem;
    }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    body {
        font-size: 12pt;
        line-height: 1.6;
    }
}

/* ==========================================
   Accessibility
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}