/* ===== RESPONSIVE UTILITIES ===== */

/* Responsive breakpoints */
:root {
    --breakpoint-xs: 0;
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-xxl: 1400px;
}

/* ===== MOBILE NAVIGATION RESPONSIVE FIXES ===== */

/* Mobile menu container */
#navbarMenu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid #e5e7eb;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    max-height: calc(100vh - 64px); /* 64px là chiều cao header */
    overflow-y: auto;
    z-index: 1000;
}

/* Mobile menu items */
#navbarMenu a,
#navbarMenu button {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #f3f4f6;
    width: 100%;
    text-align: left;
    display: block;
}

#navbarMenu a:hover,
#navbarMenu button:hover {
    background-color: #f9fafb;
}

/* Mobile dropdown menus */
#navbarMenu .group {
    position: relative;
}

#navbarMenu .group ul {
    position: static;
    width: 100%;
    margin: 0;
    padding: 0;
    background: #f9fafb;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

#navbarMenu .group li {
    border-bottom: 1px solid #e5e7eb;
}

#navbarMenu .group li:last-child {
    border-bottom: none;
}

/* Mobile menu button */
#navbarToggle {
    padding: 0.5rem;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

#navbarToggle:hover {
    background-color: #f3f4f6;
}

/* Ensure header stays on top */
header {
    position: relative;
    z-index: 1001;
}

/* ===== MOBILE LAYOUT FIXES ===== */

/* Prevent body scroll when mobile menu is open */
body.menu-open {
    overflow: hidden;
}

/* Mobile menu overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
}

/* Mobile menu container improvements */
@media (max-width: 767px) {
    #navbarMenu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid #e5e7eb;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        max-height: auto;
        overflow: visible;
        z-index: 1000;
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        border-radius: 0 0 12px 12px;
    }
    
    #navbarMenu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    /* Mobile menu items */
    #navbarMenu a,
    #navbarMenu button {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid #f3f4f6;
        width: 100%;
        text-align: left;
        display: block;
        font-size: 0.95rem;
        color: #374151;
        transition: all 0.2s ease;
        line-height: 1.4;
    }
    
    #navbarMenu a:hover,
    #navbarMenu button:hover {
        background-color: #f9fafb;
        color: #059669;
    }
    

    
    /* Mobile dropdown menus */
    #navbarMenu .group {
        position: relative;
    }
    
    #navbarMenu .group ul {
        position: static;
        width: 100%;
        margin: 0;
        padding: 0;
        background: #f9fafb;
        border-radius: 0;
        box-shadow: none;
        opacity: 1;
        transform: none;
        pointer-events: auto;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    #navbarMenu .group.active ul {
        max-height: 300px; /* Reduced height for compact design */
    }
    
    #navbarMenu .group li {
        border-bottom: 1px solid #e5e7eb;
    }
    
    #navbarMenu .group li:last-child {
        border-bottom: none;
    }
    
    #navbarMenu .group li a {
        padding: 0.5rem 1rem 0.5rem 2.5rem;
        font-size: 0.9rem;
        line-height: 1.3;
    }
    
    /* Mobile menu button */
    #navbarToggle {
        padding: 0.5rem;
        border-radius: 0.375rem;
        transition: all 0.2s ease;
        background: transparent;
        border: none;
        cursor: pointer;
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    #navbarToggle:hover {
        background-color: #f3f4f6;
    }
    
    #navbarToggle:focus {
        outline: 2px solid #059669;
        outline-offset: 2px;
    }
    
    /* Mobile menu button icon */
    #navbarToggle i {
        font-size: 1.25rem;
        color: #059669;
    }
    
    /* Header improvements for mobile */
    header {
        position: sticky;
        top: 0;
        z-index: 1001;
        background: white;
        box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    }
    
    /* Container padding for mobile */
    .max-w-7xl {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    /* Ensure mobile menu positioning */
    header {
        position: relative;
    }
    
    #navbarMenu {
        position: absolute;
        top: 100%;
        right: 0;
        left: auto;
        width: auto;
        min-width: 280px;
        max-width: 320px;
        background: white;
        border: 1px solid #e5e7eb;
        border-radius: 0 0 12px 12px;
        box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        z-index: 1000;
        max-height: 70vh;
        overflow-y: auto;
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    #navbarMenu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    /* Mobile menu scrollbar styling */
    #navbarMenu::-webkit-scrollbar {
        width: 4px;
    }
    
    #navbarMenu::-webkit-scrollbar-track {
        background: #f1f1f1;
        border-radius: 2px;
    }
    
    #navbarMenu::-webkit-scrollbar-thumb {
        background: #c1c1c1;
        border-radius: 2px;
    }
    
    #navbarMenu::-webkit-scrollbar-thumb:hover {
        background: #a8a8a8;
    }
}

/* ===== MOBILE MENU ANIMATIONS ===== */
@media (max-width: 767px) {
    #navbarMenu {
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    #navbarMenu.show {
        transform: translateX(0);
    }
    
    /* Smooth dropdown animations */
    #navbarMenu .group ul {
        transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    /* Mobile menu item hover effects */
    #navbarMenu a:active,
    #navbarMenu button:active {
        background-color: #e5e7eb;
        transform: scale(0.98);
    }
    
    /* Mobile menu button animations */
    #navbarToggle i {
        transition: transform 0.2s ease;
    }
    
    #navbarToggle:active i {
        transform: scale(0.9);
    }
}

/* ===== INDEX.PHP SPECIFIC RESPONSIVE STYLES ===== */

/* Hero Section Responsive */
@media (max-width: 768px) {
    .hero-section {
        min-height: 80vh;
        padding: 2rem 0;
        background: var(--gradient-primary) !important; /* Force background */
    }
    
    .hero-content {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: clamp(2.5rem, 6vw, 3.5rem);
        margin-bottom: 1.5rem;
        color: white !important; /* Force white color */
        -webkit-text-fill-color: white !important;
        background: none !important;
    }
    
    .hero-subtitle {
        font-size: clamp(1rem, 2.5vw, 1.25rem);
        margin-bottom: 2rem;
        color: rgba(255, 255, 255, 0.9) !important; /* Force white color */
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
        display: inline-flex !important; /* Force display */
        align-items: center !important;
        gap: 0.5rem !important;
        border-radius: 50px !important;
        font-weight: 600 !important;
        text-decoration: none !important;
        transition: all 0.3s ease !important;
        border: none !important;
        cursor: pointer !important;
    }
    
    .btn-primary {
        background: rgba(255, 255, 255, 0.9) !important;
        color: var(--primary-dark) !important;
        box-shadow: var(--shadow-lg) !important;
    }
    
    .btn-secondary {
        background: transparent !important;
        color: white !important;
        border: 2px solid rgba(255, 255, 255, 0.3) !important;
    }
    
    .floating-shape {
        display: none; /* Hide floating elements on mobile for better performance */
    }
}

@media (max-width: 480px) {
    .hero-section {
        min-height: 70vh;
        padding: 1.5rem 0;
        background: var(--gradient-primary) !important; /* Force background */
    }
    
    .hero-title {
        font-size: clamp(2rem, 5vw, 2.5rem);
        color: white !important; /* Force white color */
        -webkit-text-fill-color: white !important;
        background: none !important;
    }
    
    .hero-subtitle {
        font-size: clamp(0.875rem, 2vw, 1rem);
        margin-bottom: 1.5rem;
        color: rgba(255, 255, 255, 0.9) !important; /* Force white color */
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
        display: inline-flex !important; /* Force display */
        align-items: center !important;
        gap: 0.5rem !important;
        border-radius: 50px !important;
        font-weight: 600 !important;
        text-decoration: none !important;
        transition: all 0.3s ease !important;
        border: none !important;
        cursor: pointer !important;
    }
    
    .btn-primary {
        background: rgba(255, 255, 255, 0.9) !important;
        color: var(--primary-dark) !important;
        box-shadow: var(--shadow-lg) !important;
    }
    
    .btn-secondary {
        background: transparent !important;
        color: white !important;
        border: 2px solid rgba(255, 255, 255, 0.3) !important;
    }
}

/* About Section Responsive */
@media (max-width: 768px) {
    .about-section {
        padding: 3rem 0;
    }
    
    .about-card {
        margin: 0 1rem;
        padding: 2rem 1.5rem;
    }
    
    .about-description {
        font-size: 0.95rem;
        line-height: 1.6;
        margin-bottom: 2rem;
    }
    
    .about-features {
        gap: 1.5rem;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        margin: 0 auto;
    }
    
    .feature-title {
        font-size: 1rem;
    }
    
    .feature-description {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .about-section {
        padding: 2rem 0;
    }
    
    .about-card {
        margin: 0 0.5rem;
        padding: 1.5rem 1rem;
    }
    
    .about-description {
        font-size: 0.9rem;
    }
    
    .feature-item {
        gap: 0.75rem;
    }
    
    .feature-icon {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
}

/* Stats Section Responsive */
@media (max-width: 768px) {
    .stats-section {
        padding: 3rem 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        margin: 0 1rem;
    }
    
    .stat-item {
        padding: 1.5rem 1rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
    }
    
    .stat-label {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .stats-section {
        padding: 2rem 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin: 0 0.5rem;
    }
    
    .stat-item {
        padding: 1.25rem 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.9rem;
    }
}

/* Contact Section Responsive */
@media (max-width: 768px) {
    .contact-section {
        padding: 3rem 0;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin: 0 1rem;
        padding: 2rem 1.5rem;
    }
    
    .contact-info {
        gap: 1rem;
    }
    
    .contact-item {
        padding: 0.875rem;
        gap: 0.75rem;
    }
    
    .contact-icon {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .contact-details h4 {
        font-size: 0.95rem;
    }
    
    .contact-details p {
        font-size: 0.9rem;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .submit-btn {
        width: 100%;
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .contact-section {
        padding: 2rem 0;
    }
    
    .contact-container {
        margin: 0 0.5rem;
        padding: 1.5rem 1rem;
    }
    
    .contact-item {
        padding: 0.75rem;
        gap: 0.5rem;
    }
    
    .contact-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .contact-details h4 {
        font-size: 0.9rem;
    }
    
    .contact-details p {
        font-size: 0.85rem;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .submit-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}

/* Section Titles and Subtitles Responsive */
@media (max-width: 768px) {
    .section-title {
        font-size: clamp(1.75rem, 4vw, 2.25rem);
        margin-bottom: 1rem;
    }
    
    .section-subtitle {
        font-size: clamp(1rem, 2.5vw, 1.125rem);
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: clamp(1.5rem, 3.5vw, 2rem);
    }
    
    .section-subtitle {
        font-size: clamp(0.9rem, 2vw, 1rem);
        margin-bottom: 1.5rem;
    }
}

/* Container Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
}

/* Responsive container */
.container-responsive {
    width: 100%;
    margin-right: auto;
    margin-left: auto;
    padding-right: 1rem;
    padding-left: 1rem;
}

@media (min-width: 576px) {
    .container-responsive {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container-responsive {
        max-width: 720px;
    }
}

@media (min-width: 992px) {
    .container-responsive {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container-responsive {
        max-width: 1140px;
    }
}

@media (min-width: 1400px) {
    .container-responsive {
        max-width: 1320px;
    }
}

/* Responsive spacing utilities */
.responsive-padding {
    padding: 1rem;
}

@media (min-width: 768px) {
    .responsive-padding {
        padding: 2rem;
    }
}

@media (min-width: 992px) {
    .responsive-padding {
        padding: 3rem;
    }
}

.responsive-margin {
    margin: 1rem;
}

@media (min-width: 768px) {
    .responsive-margin {
        margin: 2rem;
    }
}

@media (min-width: 992px) {
    .responsive-margin {
        margin: 3rem;
    }
}

/* Responsive text sizing */
.text-responsive-xs {
    font-size: 0.875rem;
}

.text-responsive-sm {
    font-size: 1rem;
}

.text-responsive-md {
    font-size: 1.125rem;
}

.text-responsive-lg {
    font-size: 1.25rem;
}

.text-responsive-xl {
    font-size: 1.5rem;
}

@media (min-width: 768px) {
    .text-responsive-xs {
        font-size: 1rem;
    }
    
    .text-responsive-sm {
        font-size: 1.125rem;
    }
    
    .text-responsive-md {
        font-size: 1.25rem;
    }
    
    .text-responsive-lg {
        font-size: 1.5rem;
    }
    
    .text-responsive-xl {
        font-size: 1.75rem;
    }
}

@media (min-width: 992px) {
    .text-responsive-xs {
        font-size: 1.125rem;
    }
    
    .text-responsive-sm {
        font-size: 1.25rem;
    }
    
    .text-responsive-md {
        font-size: 1.375rem;
    }
    
    .text-responsive-lg {
        font-size: 1.625rem;
    }
    
    .text-responsive-xl {
        font-size: 2rem;
    }
}

/* Responsive grid system */
.grid-responsive {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 576px) {
    .grid-responsive {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (min-width: 768px) {
    .grid-responsive {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
}

@media (min-width: 992px) {
    .grid-responsive {
        grid-template-columns: repeat(4, 1fr);
        gap: 2.5rem;
    }
}

/* Responsive flexbox utilities */
.flex-responsive {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 768px) {
    .flex-responsive {
        flex-direction: row;
        gap: 2rem;
    }
}

.flex-responsive-reverse {
    display: flex;
    flex-direction: column-reverse;
    gap: 1rem;
}

@media (min-width: 768px) {
    .flex-responsive-reverse {
        flex-direction: row;
        gap: 2rem;
    }
}

/* Responsive visibility classes */
.hide-xs {
    display: none;
}

@media (min-width: 576px) {
    .hide-xs {
        display: block;
    }
    
    .hide-sm {
        display: none;
    }
}

@media (min-width: 768px) {
    .hide-sm {
        display: block;
    }
    
    .hide-md {
        display: none;
    }
}

@media (min-width: 992px) {
    .hide-md {
        display: block;
    }
    
    .hide-lg {
        display: none;
    }
}

@media (min-width: 1200px) {
    .hide-lg {
        display: block;
    }
    
    .hide-xl {
        display: none;
    }
}

/* Responsive image handling */
.img-responsive {
    max-width: 100%;
    height: auto;
    display: block;
}

.img-responsive-fluid {
    width: 100%;
    height: auto;
}

/* Responsive table handling */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-responsive table {
    min-width: 600px;
}

/* Responsive navigation */
.nav-responsive {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

@media (min-width: 768px) {
    .nav-responsive {
        flex-direction: row;
        gap: 2rem;
    }
}

/* Responsive card layouts */
.card-responsive {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 768px) {
    .card-responsive {
        flex-direction: row;
        gap: 2rem;
    }
}

/* Responsive sidebar */
.sidebar-responsive {
    width: 100%;
    margin-bottom: 2rem;
}

@media (min-width: 992px) {
    .sidebar-responsive {
        width: 300px;
        margin-bottom: 0;
    }
}

/* Responsive modal */
.modal-responsive {
    margin: 1rem;
    max-width: calc(100vw - 2rem);
}

@media (min-width: 576px) {
    .modal-responsive {
        margin: 1.75rem auto;
        max-width: 500px;
    }
}

@media (min-width: 768px) {
    .modal-responsive {
        margin: 3.5rem auto;
        max-width: 600px;
    }
}

/* Responsive form layouts */
.form-responsive {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .form-responsive {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (min-width: 992px) {
    .form-responsive {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
}

/* Responsive button groups */
.btn-group-responsive {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

@media (min-width: 576px) {
    .btn-group-responsive {
        flex-direction: row;
        gap: 1rem;
    }
}

/* Responsive list layouts */
.list-responsive {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 576px) {
    .list-responsive {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (min-width: 768px) {
    .list-responsive {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
}

/* Responsive spacing scale */
.space-responsive-1 { margin: 0.25rem; }
.space-responsive-2 { margin: 0.5rem; }
.space-responsive-3 { margin: 1rem; }
.space-responsive-4 { margin: 1.5rem; }
.space-responsive-5 { margin: 3rem; }

@media (min-width: 768px) {
    .space-responsive-1 { margin: 0.5rem; }
    .space-responsive-2 { margin: 1rem; }
    .space-responsive-3 { margin: 1.5rem; }
    .space-responsive-4 { margin: 2rem; }
    .space-responsive-5 { margin: 4rem; }
}

@media (min-width: 992px) {
    .space-responsive-1 { margin: 0.75rem; }
    .space-responsive-2 { margin: 1.5rem; }
    .space-responsive-3 { margin: 2rem; }
    .space-responsive-4 { margin: 3rem; }
    .space-responsive-5 { margin: 5rem; }
}

/* Responsive border radius */
.rounded-responsive {
    border-radius: 0.5rem;
}

@media (min-width: 768px) {
    .rounded-responsive {
        border-radius: 1rem;
    }
}

@media (min-width: 992px) {
    .rounded-responsive {
        border-radius: 1.5rem;
    }
}

/* Responsive shadows */
.shadow-responsive {
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

@media (min-width: 768px) {
    .shadow-responsive {
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    }
}

@media (min-width: 992px) {
    .shadow-responsive {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    }
}

/* Responsive animations */
.animate-responsive {
    transition: all 0.3s ease;
}

@media (prefers-reduced-motion: reduce) {
    .animate-responsive {
        transition: none;
    }
}

/* Responsive focus states */
.focus-responsive:focus {
    outline: 2px solid #10b981;
    outline-offset: 2px;
}

@media (min-width: 768px) {
    .focus-responsive:focus {
        outline-offset: 4px;
    }
}

/* Responsive hover effects */
.hover-responsive:hover {
    transform: translateY(-2px);
}

@media (max-width: 767px) {
    .hover-responsive:hover {
        transform: none;
    }
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .print-only {
        display: block !important;
    }
    
    .container-responsive {
        max-width: none !important;
        margin: 0 !important;
        padding: 0 !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .focus-responsive:focus {
        outline: 3px solid #000000;
        outline-offset: 2px;
    }
    
    .shadow-responsive {
        box-shadow: 0 0 0 2px #000000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .animate-responsive,
    .hover-responsive {
        transition: none !important;
        transform: none !important;
    }
}

/* ===== ADDITIONAL MOBILE OPTIMIZATIONS ===== */

/* Touch-friendly button sizes */
@media (max-width: 768px) {
    .btn,
    .submit-btn,
    .form-input,
    .form-select,
    .form-textarea {
        min-height: 44px; /* iOS recommended minimum touch target */
    }
    
    .contact-item {
        min-height: 60px; /* Ensure touch-friendly contact items */
    }
}

/* Landscape mobile optimization */
@media (max-width: 768px) and (orientation: landscape) {
    .hero-section {
        min-height: 60vh;
        padding: 1rem 0;
    }
    
    .hero-title {
        font-size: clamp(2rem, 4vw, 2.5rem);
    }
    
    .hero-subtitle {
        font-size: clamp(0.875rem, 2vw, 1rem);
        margin-bottom: 1rem;
    }
}

/* High DPI display optimization */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .floating-shape {
        border: 0.5px solid rgba(255, 255, 255, 0.1);
    }
}

/* Dark mode support for mobile */
@media (prefers-color-scheme: dark) {
    .hero-section {
        background: linear-gradient(135deg, #059669 0%, #047857 100%);
    }
    
    .contact-container {
        background: #1f2937;
        color: #f9fafb;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }
}

/* ===== TOUCH DEVICE OPTIMIZATIONS ===== */
.touch-device .floating-shape {
    animation-duration: 8s; /* Slower animations for mobile */
}

.touch-device .feature-item:hover,
.touch-device .contact-item:hover {
    transform: none; /* Disable hover effects on touch devices */
}

.touch-device .btn:hover,
.touch-device .submit-btn:hover {
    transform: none;
}

/* ===== FORM ERROR STATES ===== */
.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

/* ===== MOBILE NAVIGATION OPTIMIZATIONS ===== */
@media (max-width: 768px) {
    /* Ensure proper spacing for mobile navigation */
    .hero-section {
        padding-top: 80px; /* Account for fixed header */
    }
    
    /* Optimize button spacing on mobile */
    .btn + .btn {
        margin-top: 0.5rem;
    }
    
    /* Improve form layout on mobile */
    .form-group + .form-group {
        margin-top: 1rem;
    }
}

/* ===== TABLET OPTIMIZATIONS ===== */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero-section {
        min-height: 90vh;
    }
    
    .hero-title {
        font-size: clamp(3rem, 6vw, 4rem);
    }
    
    .hero-subtitle {
        font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

/* ===== LARGE SCREEN OPTIMIZATIONS ===== */
@media (min-width: 1200px) {
    .hero-section {
        min-height: 100vh;
    }
    
    .hero-content {
        max-width: 1400px;
    }
    
    .container {
        max-width: 1400px;
    }
    
    .about-features {
        grid-template-columns: repeat(3, 1fr);
        gap: 3rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 4rem;
    }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
@media (prefers-reduced-motion: reduce) {
    .floating-shape,
    .feature-item,
    .contact-item,
    .btn,
    .submit-btn {
        animation: none !important;
        transition: none !important;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    .hero-section {
        background: #000000;
    }
    
    .btn {
        border: 2px solid #ffffff;
    }
    
    .contact-container {
        border: 2px solid #000000;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        border: 2px solid #000000;
    }
}

/* ===== PRINT OPTIMIZATIONS ===== */
@media print {
    .hero-section {
        background: #ffffff !important;
        color: #000000 !important;
        min-height: auto;
        padding: 2rem 0;
    }
    
    .hero-title {
        color: #000000 !important;
        -webkit-text-fill-color: #000000 !important;
    }
    
    .hero-subtitle {
        color: #333333 !important;
    }
    
    .btn {
        display: none !important;
    }
    
    .floating-elements {
        display: none !important;
    }
    
    .section {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
@media (max-width: 768px) {
    /* Reduce animations on mobile for better performance */
    .floating-shape {
        animation-duration: 10s;
    }
    
    /* Optimize shadows for mobile */
    .shadow-responsive {
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }
    
    /* Reduce backdrop-filter usage on mobile */
    .stat-item {
        backdrop-filter: none;
        background: rgba(255, 255, 255, 0.15);
    }
}

/* ===== LOADING STATES ===== */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== RESPONSIVE TYPOGRAPHY SCALE ===== */
.text-scale-xs { font-size: 0.75rem; }
.text-scale-sm { font-size: 0.875rem; }
.text-scale-base { font-size: 1rem; }
.text-scale-lg { font-size: 1.125rem; }
.text-scale-xl { font-size: 1.25rem; }
.text-scale-2xl { font-size: 1.5rem; }
.text-scale-3xl { font-size: 1.875rem; }
.text-scale-4xl { font-size: 2.25rem; }

@media (min-width: 768px) {
    .text-scale-xs { font-size: 0.875rem; }
    .text-scale-sm { font-size: 1rem; }
    .text-scale-base { font-size: 1.125rem; }
    .text-scale-lg { font-size: 1.25rem; }
    .text-scale-xl { font-size: 1.375rem; }
    .text-scale-2xl { font-size: 1.625rem; }
    .text-scale-3xl { font-size: 2rem; }
    .text-scale-4xl { font-size: 2.5rem; }
}

@media (min-width: 1024px) {
    .text-scale-xs { font-size: 1rem; }
    .text-scale-sm { font-size: 1.125rem; }
    .text-scale-base { font-size: 1.25rem; }
    .text-scale-lg { font-size: 1.375rem; }
    .text-scale-xl { font-size: 1.5rem; }
    .text-scale-2xl { font-size: 1.75rem; }
    .text-scale-3xl { font-size: 2.25rem; }
    .text-scale-4xl { font-size: 3rem; }
}

/* ===== RESPONSIVE UTILITY CLASSES ===== */
.text-responsive-xs { font-size: clamp(0.75rem, 2vw, 0.875rem); }
.text-responsive-sm { font-size: clamp(0.875rem, 2.5vw, 1rem); }
.text-responsive-md { font-size: clamp(1rem, 3vw, 1.125rem); }
.text-responsive-lg { font-size: clamp(1.125rem, 3.5vw, 1.25rem); }
.text-responsive-xl { font-size: clamp(1.25rem, 4vw, 1.5rem); }

.grid-responsive {
    display: grid;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .grid-responsive {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.card-responsive {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.rounded-responsive {
    border-radius: 16px;
}

.shadow-responsive {
    box-shadow: var(--shadow-md);
}

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

.focus-responsive:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.form-responsive {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.btn-group-responsive {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

@media (max-width: 768px) {
    .btn-group-responsive {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
}

/* ===== MOBILE SECTION OPTIMIZATIONS ===== */
@media (max-width: 768px) {
    .section {
        padding: 3rem 0;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stat-item {
        padding: 1.5rem 1rem;
        text-align: center;
    }
    
    .stat-number {
        font-size: 2rem;
        font-weight: 700;
        color: var(--primary-color);
        margin-bottom: 0.5rem;
    }
    
    .stat-label {
        font-size: 0.875rem;
        color: var(--text-light);
    }
    
    .contact-container {
        flex-direction: column;
        gap: 2rem;
    }
    
    .contact-info {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .contact-item {
        display: flex;
        align-items: center;
        gap: 1rem;
        padding: 1rem;
        background: var(--bg-white);
        border-radius: 12px;
        box-shadow: var(--shadow-sm);
    }
    
    .contact-icon {
        width: 40px;
        height: 40px;
        background: var(--primary-color);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 1.25rem;
    }
    
    .contact-details h4 {
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--text-dark);
        margin-bottom: 0.25rem;
    }
    
    .contact-details p {
        font-size: 0.75rem;
        color: var(--text-light);
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        width: 100%;
        padding: 0.75rem;
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        font-size: 0.875rem;
        transition: border-color 0.3s ease;
    }
    
    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
        outline: none;
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
    }
    
    .submit-btn {
        width: 100%;
        padding: 0.875rem;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 8px;
        font-weight: 600;
        font-size: 0.875rem;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .submit-btn:hover {
        background: var(--primary-dark);
        transform: translateY(-1px);
    }
}