/* ============================================
   MINIMALIST HEADER COMPONENT STYLES
   ============================================ */

/* CSS Variables for Header */
:root {
    /* Primary Brand Colors */
    --hai-blue-dark: #1a365d;
    --hai-blue: #2563eb;
    --hai-blue-light: #3b82f6;
    --hai-cyan: #06b6d4;
    --hai-teal: #14b8a6;

    /* Warm Colors */
    --hai-gold: #f59e0b;
    --hai-orange: #ea580c;
    --hai-orange-light: #f97316;
    --hai-magenta: #ec4899;
    --hai-purple: #9333ea;

    /* Neutrals */
    --white: #FFFFFF;
    --off-white: #FAFBFC;
    --light-gray: #F1F5F9;
    --mid-gray: #E2E8F0;
    --gray: #64748B;
    --dark-gray: #475569;
    --charcoal: #334155;
    --near-black: #1E293B;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--hai-blue) 0%, var(--hai-cyan) 100%);
    --gradient-warm: linear-gradient(135deg, var(--hai-gold) 0%, var(--hai-orange) 50%, var(--hai-magenta) 100%);

    /* Minimalist Shadows */
    --shadow-minimal: 0 1px 0 rgba(0,0,0,0.06);
    --shadow-soft: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-dropdown: 0 8px 24px rgba(0,0,0,0.06);

    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Header Container */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--mid-gray);
    transition: all var(--transition-base);
}

.header.scrolled {
    border-bottom-color: var(--light-gray);
    box-shadow: var(--shadow-soft);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Logo Styles */
.logo {
    display: flex;
    align-items: center;
    gap: 0.01rem;
    text-decoration: none;
    color: var(--near-black);
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 0.85rem;
    font-weight: 700;
    line-height: 1.2;
}

.logo-human { color: var(--hai-blue-dark); }
.logo-ai { color: var(--hai-orange); }
.logo-institute { color: var(--hai-blue-dark); }

.logo-tagline {
    font-size: 0.5rem;
    color: var(--gray);
    font-weight: 500;
    white-space: nowrap;
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.mobile-toggle span {
    width: 22px;
    height: 2px;
    background: var(--near-black);
    transition: var(--transition-base);
    border-radius: 2px;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark-gray);
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: 0.01em;
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--hai-blue);
}

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

.nav-link-franchise {
    white-space: nowrap;
}

.nav-link-placements {
    background: var(--gradient-primary);
    color: var(--white) !important;
    border-radius: 6px;
    padding: 0.625rem 1.25rem;
    white-space: nowrap;
    font-weight: 500;
}

.nav-link-placements::after {
    display: none;
}

.nav-link-placements:hover {
    background: var(--gradient-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Navigation Dropdowns */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 480px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-dropdown);
    border: 1px solid var(--mid-gray);
    padding: 0.75rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1001;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.25rem;
}

.nav-dropdown::before {
    display: none;
}

.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(4px);
}

.nav-dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0.75rem;
    border-radius: 8px;
    transition: background-color var(--transition-fast);
    text-decoration: none;
    color: var(--charcoal);
}

.nav-dropdown-item:hover {
    background-color: var(--off-white);
}

.nav-dropdown-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-dropdown-icon svg {
    width: 18px;
    height: 18px;
}

.nav-dropdown-icon-blue { color: var(--hai-blue); }
.nav-dropdown-icon-cyan { color: var(--hai-cyan); }
.nav-dropdown-icon-orange { color: var(--hai-orange); }
.nav-dropdown-icon-magenta { color: var(--hai-magenta); }
.nav-dropdown-icon-purple { color: var(--hai-purple); }
.nav-dropdown-icon-gold { color: var(--hai-gold); }

.nav-dropdown-content h5 {
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--near-black);
    margin-bottom: 0.15rem;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.nav-dropdown-content p {
    font-size: 0.7rem;
    color: var(--gray);
    margin: 0;
    white-space: nowrap;
    font-weight: 400;
}

.nav-cta {
    background: var(--gradient-warm);
    color: var(--white) !important;
    text-align: center;
    margin-left: 1.5rem;
    white-space: nowrap;
    border-radius: 6px;
    padding: 0.625rem 1.5rem;
    transition: all var(--transition-fast);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--gradient-warm);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(234, 88, 12, 0.4);
}

/* Mobile Navigation */
.nav-mobile {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 999;
    overflow-y: auto;
    padding: 1.5rem 2rem 2rem;
    border-top: 1px solid var(--mid-gray);
}

.nav-mobile.active {
    display: block;
}

.nav-mobile-section {
    border-bottom: 1px solid var(--light-gray);
    padding: 1rem 0;
}

.nav-mobile-title {
    padding: 0.75rem 0;
    font-weight: 500;
    color: var(--near-black);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    letter-spacing: -0.01em;
}

.nav-mobile-title::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--gray);
    font-weight: 300;
    transition: transform 0.2s ease;
}

.nav-mobile-title.active::after {
    content: '−';
}

.nav-mobile-links {
    display: none;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    border-top: 1px solid var(--mid-gray);
    margin-top: 0.25rem;
}

.nav-mobile-links.active {
    display: block;
}

.nav-mobile-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    color: var(--dark-gray);
    text-decoration: none;
    white-space: nowrap;
    font-weight: 400;
    transition: color var(--transition-fast);
    border-radius: 6px;
}

.nav-mobile-link:hover {
    color: var(--hai-blue);
    background-color: var(--off-white);
}

/* Mobile Dropdown Icons */
.nav-mobile-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-mobile-icon svg {
    width: 16px;
    height: 16px;
}

.nav-mobile-icon-blue { color: var(--hai-blue); }
.nav-mobile-icon-cyan { color: var(--hai-cyan); }
.nav-mobile-icon-orange { color: var(--hai-orange); }
.nav-mobile-icon-magenta { color: var(--hai-magenta); }
.nav-mobile-icon-purple { color: var(--hai-purple); }
.nav-mobile-icon-gold { color: var(--hai-gold); }

.nav-mobile-franchise {
    display: block;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    color: var(--dark-gray);
    text-decoration: none;
    white-space: nowrap;
    font-weight: 400;
    transition: color var(--transition-fast);
}

.nav-mobile-franchise:hover {
    color: var(--hai-blue);
}

.nav-mobile-placements {
    display: block;
    padding: 0.875rem 1.25rem;
    margin: 1rem 0;
    background: var(--hai-blue);
    color: var(--white);
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    font-size: 0.875rem;
    text-decoration: none;
    white-space: nowrap;
}

.nav-mobile-cta {
    padding: 1.5rem 0 0;
}

.nav-mobile-cta .btn {
    width: 100%;
    justify-content: center;
}

/* Desktop Only */
@media (min-width: 769px) {
    .mobile-toggle {
        display: none;
    }
}

/* Mobile Only */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .header-inner {
        height: 64px;
        padding: 0 1.5rem;
    }

    .logo-img {
        height: 36px;
    }

    .logo-name {
        font-size: 0.75rem;
    }

    .logo-tagline {
        font-size: 0.45rem;
    }
}

/* ============================================
   HEADER ENROLLMENT POPUP STYLES
   ============================================ */
.hdr-popup-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 1rem;
}

.hdr-popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.hdr-popup-container {
    background: var(--white);
    border-radius: 20px;
    width: 100%;
    max-width: 450px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.hdr-popup-overlay.active .hdr-popup-container {
    transform: translateY(0);
}

.hdr-popup-close {
    position: absolute;
    top: 1rem; right: 1rem;
    width: 36px; height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: background 200ms ease;
    line-height: 1;
    z-index: 1;
}

.hdr-popup-close:hover {
    background: rgba(255, 255, 255, 0.35);
}

.hdr-popup-header {
    background: linear-gradient(135deg, var(--hai-blue-dark) 0%, var(--hai-blue) 50%, var(--hai-cyan) 100%);
    padding: 2rem 1.5rem;
    text-align: center;
    border-radius: 20px 20px 0 0;
}

.hdr-popup-header h3 {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.hdr-popup-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin: 0;
}

.hdr-popup-form {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.hdr-popup-form .hdr-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.hdr-popup-form .hdr-form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark-gray);
}

.hdr-popup-form .hdr-form-group input,
.hdr-popup-form .hdr-form-group select,
.hdr-popup-form .hdr-form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--mid-gray);
    border-radius: 10px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    transition: border-color 200ms ease, box-shadow 200ms ease;
    width: 100%;
    background: var(--white);
}

.hdr-popup-form .hdr-form-group input:focus,
.hdr-popup-form .hdr-form-group select:focus,
.hdr-popup-form .hdr-form-group textarea:focus {
    outline: none;
    border-color: var(--hai-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.hdr-popup-form .hdr-popup-submit {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    background: linear-gradient(135deg, var(--hai-gold) 0%, var(--hai-orange) 50%, var(--hai-magenta) 100%);
    color: var(--white);
    transition: all 300ms ease;
}

.hdr-popup-form .hdr-popup-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(234, 88, 12, 0.35);
}

.hdr-popup-form .hdr-popup-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}