/* Mobile Navigation */
.nav-mobile {
    display: none;
}

/* Enterprise-Grade Mobile Styles */
:root {
    --header-height: 72px;
    --mobile-padding: 1.75rem;
    --nav-blur: blur(15px);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --hero-gradient: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(91, 33, 182, 0.05) 100%);
}

/* High-End Tablet and Desktop */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 var(--mobile-padding);
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
        gap: 2.75rem;
    }

    .hero-content {
        max-width: 900px;
        padding: 0 var(--mobile-padding);
    }
}

/* Premium Medium Screens */
@media (max-width: 1024px) {
    :root {
        --header-height: 68px;
    }

    .hero {
        position: relative;
        min-height: calc(100vh - var(--header-height));
        padding: 7rem 0 5rem;
        display: flex;
        align-items: center;
        background: var(--hero-gradient);
        overflow: hidden;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 100%;
        background: radial-gradient(circle at top right, rgba(124, 58, 237, 0.08), transparent 60%);
        pointer-events: none;
    }

    .hero h1 {
        font-size: clamp(2.75rem, 6vw, 3.75rem);
        line-height: 1.1;
        letter-spacing: -0.03em;
        background: linear-gradient(135deg, var(--heading-color) 0%, var(--primary-color) 100%);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 1.5rem;
    }

    .lead {
        font-size: clamp(1.25rem, 2.2vw, 1.5rem);
        line-height: 1.6;
        color: var(--text-color);
        margin: 0 0 3rem;
        opacity: 0.9;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2.5rem;
    }

    section {
        padding: 7rem 0;
        position: relative;
    }

    .section-header {
        margin-bottom: 5rem;
        text-align: center;
    }

    .section-header h2 {
        font-size: clamp(2.25rem, 4vw, 3rem);
        margin-bottom: 1.5rem;
        background: linear-gradient(135deg, var(--heading-color), var(--primary-color));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }
}

/* Enterprise Mobile Layout */
@media (max-width: 768px) {
    :root {
        --header-height: 64px;
        --mobile-padding: 1.5rem;
    }

    .nav {
        height: var(--header-height);
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: var(--nav-blur);
        border-bottom: 1px solid rgba(124, 58, 237, 0.12);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        transition: var(--transition-smooth);
    }

    .nav-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 100%;
        padding: 0 var(--mobile-padding);
    }

    .nav-logo {
        font-size: 1.625rem;
        font-weight: 700;
        background: linear-gradient(135deg, var(--heading-color), var(--primary-color));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        letter-spacing: -0.02em;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: var(--nav-blur);
        padding: 2.5rem var(--mobile-padding);
        transform: translateX(100%);
        transition: var(--transition-smooth);
        display: flex;
        flex-direction: column;
        gap: 1.25rem;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu a {
        font-size: 1.375rem;
        font-weight: 500;
        padding: 1.25rem 0;
        border-bottom: 1px solid rgba(124, 58, 237, 0.12);
        transition: var(--transition-smooth);
        letter-spacing: -0.01em;
    }

    .nav-menu a:hover {
        color: var(--primary-color);
        transform: translateX(10px);
    }

    .nav-toggle {
        width: 36px;
        height: 36px;
        position: relative;
        cursor: pointer;
        z-index: 2;
        background: none;
        border: none;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--heading-color);
        position: absolute;
        transition: var(--transition-smooth);
    }

    .nav-toggle span:nth-child(1) { top: 12px; }
    .nav-toggle span:nth-child(2) { top: 18px; }
    .nav-toggle span:nth-child(3) { top: 24px; }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
        width: 28px;
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
        transform: translateX(-10px);
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4px, -4px);
        width: 28px;
    }

    /* Premium Content Sections */
    .hero {
        padding-top: calc(var(--header-height) + 4rem);
        text-align: left;
        background: var(--hero-gradient);
    }

    .hero-content {
        max-width: 100%;
        position: relative;
        z-index: 1;
    }

    .hero h1 {
        font-size: clamp(2.5rem, 7vw, 3.25rem);
        letter-spacing: -0.04em;
        margin-bottom: 2rem;
    }

    .lead {
        font-size: 1.25rem;
        line-height: 1.7;
        margin: 0 0 3rem;
        opacity: 0.9;
    }

    .cta-group {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.25rem;
        max-width: 100%;
    }

    .btn {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1.125rem;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        border-radius: 12px;
        transition: var(--transition-smooth);
        letter-spacing: -0.01em;
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
    }

    .btn-secondary {
        background: rgba(124, 58, 237, 0.1);
        color: var(--primary-color);
    }

    /* Enterprise Skills Section */
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .skill-card {
        padding: 2.5rem;
        text-align: left;
        background: rgba(255, 255, 255, 0.8);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(124, 58, 237, 0.12);
        border-radius: 16px;
        box-shadow: var(--card-shadow);
        transition: var(--transition-smooth);
        display: grid;
        grid-template-columns: auto 1fr;
        align-items: center;
        gap: 2rem;
    }

    .skill-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    }

    .skill-card i {
        font-size: 3rem;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    /* Premium Projects Section */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .project-card {
        margin: 0;
        border-radius: 16px;
        overflow: hidden;
        background: rgba(255, 255, 255, 0.8);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(124, 58, 237, 0.12);
        box-shadow: var(--card-shadow);
        transition: var(--transition-smooth);
    }

    .project-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    }

    .project-content {
        padding: 2.5rem;
    }

    .project-tech {
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        margin-top: 2rem;
    }

    .project-tech span {
        padding: 0.75rem 1.25rem;
        background: rgba(124, 58, 237, 0.08);
        color: var(--primary-color);
        border-radius: 8px;
        font-weight: 500;
        font-size: 0.9375rem;
        letter-spacing: -0.01em;
    }

    /* Enterprise Contact Section */
    .contact-form {
        padding: 3rem;
        border-radius: 20px;
        background: rgba(255, 255, 255, 0.8);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(124, 58, 237, 0.12);
        box-shadow: var(--card-shadow);
    }

    .form-group {
        margin-bottom: 2rem;
    }

    .form-group label {
        display: block;
        margin-bottom: 0.75rem;
        font-weight: 600;
        color: var(--heading-color);
        font-size: 1.125rem;
    }

    .form-group input,
    .form-group textarea {
        width: 100%;
        padding: 1.25rem;
        border-radius: 12px;
        border: 2px solid rgba(124, 58, 237, 0.12);
        background: rgba(255, 255, 255, 0.9);
        font-size: 1.125rem;
        transition: var(--transition-smooth);
    }

    .form-group input:focus,
    .form-group textarea:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.1);
        outline: none;
    }
}

/* Luxury Mobile Portrait */
@media (max-width: 480px) {
    :root {
        --mobile-padding: 1.25rem;
    }

    .hero h1 {
        font-size: clamp(2.25rem, 6vw, 2.75rem);
    }

    .lead {
        font-size: 1.125rem;
    }

    .skill-card,
    .project-content,
    .contact-form {
        padding: 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }
}

/* Premium Touch Interactions */
@media (hover: none) {
    .btn:active,
    .nav-menu a:active {
        transform: scale(0.97);
        opacity: 0.9;
    }

    .skill-card:active,
    .project-card:active {
        transform: translateY(2px);
        box-shadow: var(--card-shadow);
    }
}

/* Enterprise Landscape Mode */
@media (max-height: 480px) and (orientation: landscape) {
    .hero {
        padding: 5rem 0;
        min-height: auto;
    }

    .nav-menu {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 1.25rem;
        padding: 2rem;
    }

    .cta-group {
        grid-template-columns: repeat(2, 1fr);
        max-width: 600px;
    }
}

/* Touch Interactions */
@media (hover: none) {
    .btn:active,
    .nav-menu a:active {
        transform: scale(0.98);
        opacity: 0.9;
    }

    .skill-card:active,
    .project-card:active {
        transform: translateY(2px);
    }
}

/* Landscape Mode */
@media (max-height: 480px) and (orientation: landscape) {
    .hero {
        padding: 4rem 0;
        min-height: auto;
    }

    .nav-menu {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
        padding: 1.5rem;
    }

    .cta-group {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0f172a;
        --text-color: #e2e8f0;
        --heading-color: #f8fafc;
        --card-background: #1e293b;
        --border-color: #334155;
    }

    .hero,
    .section-contact {
        background: linear-gradient(135deg, rgba(37,99,235,0.05) 0%, rgba(14,165,233,0.05) 100%);
    }

    .project-tech span {
        background: rgba(37,99,235,0.15);
    }

    .highlight::after {
        background-color: rgba(37,99,235,0.3);
    }
}