/* ==========================================================================
   1. CSS Variables (:root)
   ========================================================================== */
:root {
    /* Colors from original palette */
    --purple-color: #8A2BE2;
    --blue-color-hover: #007BFF;
    --button-text-color: #FFFFFF;
    --primary-color: #00AEEF;
    --primary-color-dark: #0095c7;
    --clr-logo-be-blue: #75B8D9;
    --clr-logo-e-pink: #F8C8DC;
    --clr-logo-long-orange: #FDBF73;

    --clr-primary-900: #0D0C22;
    --clr-primary-700: #1A183E;
    --clr-primary-500: #2E2A66;
    --clr-primary-300: #4D4CAC;
    --clr-primary-100: #F0F0FF;

    --clr-accent-500: #242424;
    --clr-accent-300: #8C52FF;
    --clr-accent-blue: #007bff;
    --clr-accent-100: #dddddd;
    --clr-accent-pink-500: #E43DAB;

    --clr-secondary-900: #111827;
    --clr-secondary-700: #374151;
    --clr-secondary-500: #6B7280;
    --clr-secondary-300: #D1D5DB;
    --clr-secondary-100: #F3F4F6;
    --clr-secondary-50: #F9FAFB;

    --clr-common-white: #ffffff;
    --clr-common-black: #000000;

    /* Semantic Colors */
    --clr-background: var(--clr-common-white);
    --clr-background-alt: var(--clr-secondary-50);
    --clr-text-main: var(--clr-secondary-700);
    --clr-text-headings: var(--clr-primary-900);
    --clr-text-light: var(--clr-secondary-500);
    --clr-text-on-dark: var(--clr-common-white);
    --clr-border: var(--clr-secondary-200, #E5E7EB);
    --clr-border-strong: var(--clr-secondary-300);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--clr-primary-500) 0%, var(--clr-primary-300) 100%);
    --gradient-accent: linear-gradient(135deg, var(--clr-accent-500) 0%, var(--clr-accent-300) 100%);
    --gradient-cta-bg: linear-gradient(135deg, var(--clr-primary-700) 0%, var(--clr-primary-900) 100%);

    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Montserrat', sans-serif;

    --fs-base: 16px;
    --fs-xs: 0.75rem;  /* 12px */
    --fs-sm: 0.875rem; /* 14px */
    --fs-md: 1rem;     /* 16px */
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 1.875rem;
    --fs-4xl: 2.5rem;
    --fs-5xl: 3.25rem;

    --leading-none: 1;
    --leading-tight: 1.2;
    --leading-snug: 1.375;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* Spacing */
    --spacing-unit: 8px;
    --spacing-xs: calc(0.5 * var(--spacing-unit)); /* 4px */
    --spacing-sm: calc(1 * var(--spacing-unit));   /* 8px */
    --spacing-md: calc(2 * var(--spacing-unit));   /* 16px */
    --spacing-lg: calc(3 * var(--spacing-unit));
    --spacing-xl: calc(4.5 * var(--spacing-unit));
    --spacing-2xl: calc(7 * var(--spacing-unit));
    --spacing-3xl: calc(10 * var(--spacing-unit));
    --spacing-4xl: calc(14 * var(--spacing-unit));

    /* Borders */
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.07), 0 1px 2px 0 rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-duration-fast: 200ms;
    --transition-duration-normal: 350ms;
    --transition-timing-function: ease-in-out;

    /* Layout */
    --container-max-width: 1200px;
    --container-padding-desktop: var(--spacing-lg);
    --container-padding-mobile: var(--spacing-md);

    --header-height: 65px; /* MODIFIED: Reduced header height */
    --header-height-scrolled: 55px; /* MODIFIED: Reduced scrolled header height */

    /* Button Specific Colors (from original palette) */
    --my-button-blue-normal: #5DADE2;
    --my-button-blue-hover: #2E86C1;
    --my-button-text-color: var(--clr-common-white);

    --my-accent-button-blue-normal: #AED6F1;
    --my-accent-button-blue-hover: #3498DB;
    --my-accent-button-text-color: var(--clr-primary-700);
}

/* ==========================================================================
   2. Reset & Base Styles (Selected for header context)
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border-width: 0;
    border-style: solid;
    border-color: var(--clr-border);
}

html {
    line-height: var(--leading-normal);
    font-size: var(--fs-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    color: var(--clr-text-main);
    background-color: var(--clr-background);
    overflow-x: hidden;
    font-size: clamp(0.9375rem, 0.89rem + 0.25vw, 1.0625rem);
}

body.no-scroll {
    overflow: hidden;
}

a {
    color: var(--clr-accent-300);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-duration-fast) ease-in-out;
}
a:hover {
    color: var(--clr-accent-500);
}

ul, ol {
    list-style: none;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button {
    font: inherit;
}

/* ==========================================================================
   3. Layout & Helper Classes (Selected for header context)
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding-desktop);
    padding-right: var(--container-padding-desktop);
}

main#main-content {
    padding-top: var(--header-height);
}

/* ==========================================================================
   4. Buttons (Included as index.html header uses them in .header-actions)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: calc(var(--spacing-sm) + 2px) var(--spacing-lg);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: var(--fs-md);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    text-align: center;
    border: 2px solid transparent;
    transition: all var(--transition-duration-normal) var(--transition-timing-function);
    position: relative;
    overflow: hidden;
    z-index: 1;
    white-space: nowrap;
    line-height: var(--leading-none);
    box-shadow: var(--shadow-sm);
}
.btn i,
.btn svg {
    font-size: 1.1em;
    line-height: 1;
}

.btn--primary {
    background-color: var(--my-button-blue-normal);
    color: var(--my-button-text-color);
    border-color: var(--my-button-blue-normal);
}
.btn--primary:hover {
    background-color: var(--my-button-blue-hover);
    border-color: var(--my-button-blue-hover);
    transform: translateY(-3px) scale(1.03);
    box-shadow: var(--shadow-lg);
}

.btn--accent {
    background-color: var(--my-accent-button-blue-normal);
    color: var(--my-accent-button-text-color);
    border-color: var(--my-accent-button-blue-normal);
}
.btn--accent:hover {
    background-color: var(--my-accent-button-blue-hover);
    color: var(--clr-primary-900);
    border-color: var(--my-accent-button-blue-hover);
    transform: translateY(-3px) scale(1.03);
    box-shadow: var(--shadow-lg);
}

.btn--outline {
    background-color: transparent;
    color: var(--clr-primary-700);
    border-color: var(--clr-primary-500);
}
.btn--outline:hover {
    background-color: var(--clr-primary-100);
    color: var(--clr-primary-700);
    border-color: var(--clr-primary-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--fs-lg);
}
.btn--sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--fs-sm);
    border-width: 1.5px;
    line-height: 1.5;
}

/* ==========================================================================
   5. Site Header (Styles from index.css)
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    height: var(--header-height);
    transition: height var(--transition-duration-fast) ease-in-out,
                background-color var(--transition-duration-fast) ease-in-out,
                box-shadow var(--transition-duration-fast) ease-in-out;
}
.site-header.is-scrolled {
    height: var(--header-height-scrolled);
    background-color: rgba(255, 255, 255, 1);
    box-shadow: var(--shadow-md);
}
.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    gap: var(--spacing-md);
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    flex-shrink: 0;
}
.site-logo:hover .site-logo__icon {
    filter: drop-shadow(0 0 8px var(--clr-logo-be-blue));
}
.site-logo__icon {
    height: 30px; /* MODIFIED: Reduced logo icon size */
    width: auto;
    object-fit: contain;
    transition: filter var(--transition-duration-normal) ease-in-out;
}
.site-logo__text-custom {
    font-family: var(--font-secondary);
    font-weight: 700;
    color: var(--clr-logo-be-blue);
    line-height: 1;
    font-size: clamp(1.0rem, 0.8rem + 0.4vw, 1.2rem); /* MODIFIED: Slightly reduced from "longer" version for balance */
    transition: color var(--transition-duration-fast) ease-in-out;
}
.site-logo__text-custom:hover {
    color: var(--clr-accent-blue);
}

/* Main Navigation */
.main-nav {
    flex-shrink: 1;
    flex-grow: 1;
    min-width: 0;
    display: flex;
    justify-content: center;
}
.main-nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs); /* MODIFIED: Reduced nav items gap */
}
.main-nav__item {
    /* No specific styles, relies on flex gap */
}
.main-nav__link {
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: var(--fs-sm); /* MODIFIED: Reduced nav link font size */
    color: var(--clr-primary-700);
    padding: calc(var(--spacing-xs) + 2px) var(--spacing-md); /* MODIFIED: Reduced vertical padding, kept horizontal */
    border-radius: var(--border-radius-lg);
    position: relative;
    transition: color var(--transition-duration-fast) ease,
                background-color var(--transition-duration-fast) ease,
                background-image var(--transition-duration-fast) ease, /* Added for gradient transition */
                box-shadow var(--transition-duration-fast) ease,
                transform var(--transition-duration-fast) ease;
    white-space: nowrap;
    border: 2px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs); /* MODIFIED: Reduced gap between icon and text */
}
.main-nav__link i {
    font-size: 1em; /* MODIFIED: Reduced icon size in nav links */
    line-height: 1;
}

.main-nav__link:hover:not(.is-active) {
    color: var(--clr-primary-700);
    background-color: var(--clr-primary-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.main-nav__link.is-active {
    color: var(--clr-common-white);
    background-image: var(--gradient-primary);
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

/* Header Actions (Buttons) */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}
.header-actions .btn--sm {
    padding: var(--spacing-xs) calc(var(--spacing-sm) + 2px);
    font-size: calc(var(--fs-sm) - 2px); /* MODIFIED: Adjusted for balance with new nav link size */
    min-width: auto;
}

/* Mobile Navigation */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    margin-left: var(--spacing-xs);
    z-index: 1005;
}
.mobile-nav-toggle__icon {
    font-size: var(--fs-2xl);
    color: var(--clr-primary-700);
}
.mobile-nav-toggle.is-active {
    position: fixed;
    top: var(--spacing-sm); /* MODIFIED: Adjusted for thinner header */
    right: var(--container-padding-mobile);
    z-index: 1005;
}
.mobile-nav-toggle .fa-times { display: none; }
.mobile-nav-toggle.is-active .fa-bars { display: none; }
.mobile-nav-toggle.is-active .fa-times { display: block !important; }


.main-nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.99);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl) 0;
    animation: slideDownMenu 0.3s ease-out forwards;
    overflow-y: auto;
    z-index: 1002;
}
@keyframes slideDownMenu {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
.main-nav.is-open .main-nav__list {
    flex-direction: column;
    gap: var(--spacing-sm); /* MODIFIED: Slightly reduced gap for mobile */
    align-items: center;
    width: 100%;
    padding-top: calc(var(--header-height-scrolled) + var(--spacing-lg));
    padding-bottom: var(--spacing-lg);
}
.main-nav.is-open .main-nav__link {
    display: block;
    padding: var(--spacing-md) var(--spacing-xl);
    width: auto;
    min-width: 220px; /* MODIFIED: Slightly smaller min-width */
    border-bottom: none;
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--clr-primary-700);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-sm); /* MODIFIED: Slightly reduced margin */
    text-align: center;
}
.main-nav.is-open .main-nav__link:last-child { margin-bottom: 0; }

.main-nav.is-open .main-nav__link:hover,
.main-nav.is-open .main-nav__link.is-active {
    background-color: var(--clr-primary-300);
    color: var(--clr-common-white);
    background-image: none;
}


/* ==========================================================================
   16. Media Queries (Relevant parts for header from index.css)
   ========================================================================== */

@media (min-width: 1025px) {
    /* Base styles are now thinner */
}

@media (min-width: 769px) and (max-width: 1024px) {
    .site-header .container {
        gap: var(--spacing-sm);
    }
    .site-logo__text-custom {
        font-size: clamp(0.9rem, 0.7rem + 0.4vw, 1.1rem); /* Adjusted for thinner header */
    }
    .main-nav__list {
        gap: 2px; /* MODIFIED: Very tight gap for this breakpoint */
    }
    .main-nav__link {
        padding: var(--spacing-xs) var(--spacing-sm); /* MODIFIED: Tighter padding */
        font-size: var(--fs-xs); /* MODIFIED: Smaller font for this breakpoint */
    }
    .header-actions {
        gap: 2px; /* MODIFIED: Very tight gap */
    }
    .header-actions .btn--sm {
        padding: calc(var(--spacing-xs) - 1px) calc(var(--spacing-sm) - 2px); /* MODIFIED: Tighter button padding */
        font-size: calc(var(--fs-xs) - 1px); /* MODIFIED: Smaller button font */
    }
}

@media (max-width: 992px) {
    .container {
        padding-left: var(--container-padding-mobile);
        padding-right: var(--container-padding-mobile);
    }
    .site-logo__icon {
        height: 28px; /* MODIFIED: Adjusted for new base size */
    }

    .mobile-nav-toggle {
        display: block;
    }
    .main-nav {
        display: none;
    }
     .main-nav.is-open {
        top: 0;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px; /* MODIFIED: Slightly smaller base for mobile if needed */
    }
    main#main-content {
        padding-top: var(--header-height-scrolled);
    }
}

@media (max-width: 480px) {
    .site-logo__icon {
        height: 26px;
    }
    .site-logo__text-custom {
        font-size: var(--fs-md); /* Kept slightly larger for readability on small screens */
    }
    .site-logo {
        gap: var(--spacing-xs);
    }
    .header-actions .btn--sm {
        font-size: calc(var(--fs-xs) - 1px);
        padding: var(--spacing-xs) calc(var(--spacing-sm) - 2px);
    }
    .mobile-nav-toggle__icon {
        font-size: var(--fs-xl); /* Kept for good tap target */
    }
}