/* ==============================================
   RESPONSIVE DESIGN - UNIFIED STYLES
   Modern, Clean, and Optimized for All Devices
   ============================================== */

/* ===== CSS VARIABLES FOR RESPONSIVE ===== */
:root {
    --mobile-padding: 15px;
    --tablet-padding: 25px;
    --section-padding-mobile: 60px 0;
    --section-padding-tablet: 80px 0;
    --header-height-mobile: 55px;
    --header-height-desktop: 60px;
}

/* ==============================================
   BREAKPOINT: LARGE TABLETS (max-width: 992px)
   ============================================== */
@media (max-width: 992px) {
    /* Section Adjustments */
    section.section {
        padding: var(--section-padding-tablet);
        margin-bottom: 40px;
    }
    
    .section-header h2 {
        font-size: 2.2rem;
    }
    
    /* About Section */
    .about-content {
        padding-left: 20px;
    }
    
    .about-content h3 {
        font-size: 2rem;
    }
    
    .about-img img {
        width: 400px;
        height: 400px;
    }
    
    /* Navigation */
    .nav-links a {
        padding: 8px 12px;
        font-size: 14px;
    }
}

/* ==============================================
   BREAKPOINT: TABLETS (max-width: 768px)
   ============================================== */
@media (max-width: 768px) {
    /* ===== GENERAL MOBILE STYLES ===== */
    body {
        font-size: 15px;
    }
    
    section.section {
        padding: var(--section-padding-mobile);
        margin-bottom: 30px;
    }
    
    .container {
        padding-left: var(--mobile-padding);
        padding-right: var(--mobile-padding);
    }
    
    /* ===== TYPOGRAPHY ===== */
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }
    h3 { font-size: 1.3rem; }
    
    /* ===== NAVIGATION - IMPROVED MOBILE MENU ===== */
    .side-nav {
        height: var(--header-height-mobile);
        padding: 0 var(--mobile-padding);
        justify-content: space-between;
    }
    
    .nav-toggle-btn {
        display: flex;
        width: 40px;
        height: 40px;
        border-radius: 8px;
        background: rgba(47, 129, 217, 0.1);
        transition: all 0.3s ease;
    }
    
    .nav-toggle-btn:active {
        background: rgba(47, 129, 217, 0.2);
        transform: scale(0.95);
    }
    
    .nav-toggle-btn span {
        width: 22px;
        height: 2px;
        margin: 3px 0;
        border-radius: 2px;
        transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    }
    
    /* Animated X on active */
    .nav-toggle-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle-btn.active span:nth-child(2) {
        opacity: 0;
        transform: translateX(-20px);
    }
    
    .nav-toggle-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .nav-links {
        position: fixed;
        top: var(--header-height-mobile);
        left: 0;
        right: 0;
        background: rgba(13, 17, 23, 0.98);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        padding: 20px 0;
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-radius: 0 0 20px 20px;
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
        max-height: calc(100vh - var(--header-height-mobile));
        overflow-y: auto;
    }
    
    .side-nav.collapsed .nav-links {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links li {
        margin: 0;
        transform: translateX(-20px);
        opacity: 0;
        transition: all 0.3s ease;
    }
    
    .side-nav.collapsed .nav-links li {
        transform: translateX(0);
        opacity: 1;
    }
    
    .side-nav.collapsed .nav-links li:nth-child(1) { transition-delay: 0.1s; }
    .side-nav.collapsed .nav-links li:nth-child(2) { transition-delay: 0.15s; }
    .side-nav.collapsed .nav-links li:nth-child(3) { transition-delay: 0.2s; }
    .side-nav.collapsed .nav-links li:nth-child(4) { transition-delay: 0.25s; }
    .side-nav.collapsed .nav-links li:nth-child(5) { transition-delay: 0.3s; }
    
    .nav-links a {
        padding: 16px 25px;
        font-size: 16px;
        border-left: 3px solid transparent;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
        background: rgba(47, 129, 217, 0.15);
        border-left-color: var(--primary-color);
    }
    
    .nav-links a i {
        font-size: 18px;
        width: 24px;
        text-align: center;
    }
    
    /* ===== HERO SECTION - MOBILE ===== */
    .hero-section {
        min-height: 100vh;
        height: auto;
        padding: 100px 0 80px;
    }
    
    .hero-content {
        padding: 0 10px;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
        line-height: 1.2;
        margin-bottom: 15px;
        white-space: nowrap;
    }
    
    .hero-content h2 {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }
    
    .hero-description {
        font-size: 0.9rem;
        line-height: 1.5;
        padding: 0 15px;
    }
    
    /* Particles - Reduced on Mobile */
    #particles-js {
        opacity: 0.4;
    }
    
    /* CTA Buttons - Stacked on Mobile */
    .hero-content .cta-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 15px;
        margin-top: 30px;
    }
    
    .hero-content .cta-buttons .btn {
        width: 80%;
        max-width: 280px;
        padding: 14px 30px;
        font-size: 14px;
        border-radius: 50px;
    }
    
    .hero-content .cta-buttons .btn-primary {
        background: linear-gradient(135deg, var(--primary-color), #2f81d9);
        box-shadow: 0 4px 20px rgba(47, 129, 217, 0.4);
    }
    
    .hero-content .cta-buttons .btn-outline {
        border: 2px solid var(--primary-color);
        background: transparent;
    }
    
    /* Hero Social Icons */
    .hero-social {
        gap: 12px;
        margin-top: 35px;
    }
    
    .hero-social a {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    /* Scroll Down Button */
    .scroll-down-btn {
        width: 45px;
        height: 45px;
        font-size: 20px;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
    }
    
    /* ===== ABOUT SECTION - MOBILE ===== */
    .about-img {
        max-width: 320px;
        margin: 0 auto 40px;
        padding: 20px;
    }
    
    .about-img img {
        width: 100%;
        height: auto;
        aspect-ratio: 1/1;
        object-fit: cover;
    }
    
    .about-img:hover img {
        transform: none;
    }
    
    .about-content {
        padding: 0;
        text-align: center;
    }
    
    .about-content h3 {
        font-size: 1.6rem;
    }
    
    .about-content h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .about-content .lead {
        font-size: 1.1rem;
    }
    
    .about-content p {
        font-size: 1rem;
        text-align: left;
    }
    
    /* About Buttons */
    .about-content .mt-4 {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .about-content .btn {
        width: 80%;
        max-width: 250px;
        padding: 14px 28px;
        border-radius: 50px;
    }
    
    /* Stats Row - Hidden on mobile */
    .stats-row {
        display: none !important;
    }
    
    .stat-item {
        display: none !important;
    }
    
    .stat-number {
        font-size: 1.6rem;
    }
    
    .stat-label {
        font-size: 0.7rem;
    }
    
    /* ===== CAPABILITIES GRID - MOBILE ===== */
    .capabilities-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 25px;
    }
    
    .capability-card {
        padding: 25px 20px;
        border-radius: 16px;
    }
    
    .capability-card:hover {
        transform: translateY(-4px);
    }
    
    .card-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: 18px;
    }
    
    .capability-card:hover .card-icon {
        transform: scale(1.05);
    }
    
    .capability-card h3 {
        font-size: 1.2rem;
    }
    
    .capability-card p {
        font-size: 0.95rem;
    }
    
    /* ===== SKILLS SECTION - MOBILE ===== */
    .skill-card {
        padding: 25px 20px;
        margin-bottom: 20px;
    }
    
    .skill-card:hover {
        transform: translateY(-5px);
    }
    
    /* ===== PROJECT CARDS - MOBILE ===== */
    .project-card {
        margin-bottom: 25px;
    }
    
    .project-card img {
        height: 200px;
        object-fit: cover;
    }
    
    .project-card:hover img {
        transform: none;
    }
    
    .project-overlay {
        opacity: 1;
        background: rgba(0, 0, 0, 0.7);
    }
    
    .project-buttons {
        display: flex;
        gap: 10px;
    }
    
    .project-buttons .btn {
        padding: 10px 20px;
        font-size: 13px;
    }
    
    /* ===== CONTACT SECTION - MOBILE ===== */
    .contact-form .form-control {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 14px 18px;
    }
    
    .contact-form .btn {
        width: 100%;
        padding: 14px;
        font-size: 15px;
    }
    
    /* Info Items */
    .info-item {
        flex-direction: row;
        align-items: flex-start;
        gap: 12px;
        padding: 12px 0;
    }
    
    .info-item i {
        font-size: 20px;
        width: 24px;
        margin-top: 3px;
    }
    
    .info-item span {
        font-size: 0.95rem;
        word-break: break-word;
    }
    
    /* ===== FOOTER - MOBILE ===== */
    footer {
        padding: 40px 0 20px;
        text-align: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .scroll-top-btn {
        width: 42px;
        height: 42px;
        right: 15px;
        bottom: 15px;
        font-size: 16px;
    }
    
    /* ===== DISABLE HEAVY ANIMATIONS ON MOBILE ===== */
    [data-aos] {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    
    /* Reduce motion for performance */
    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
    }
}

/* ==============================================
   BREAKPOINT: SMALL PHONES (max-width: 480px)
   ============================================== */
@media (max-width: 480px) {
    /* Typography */
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .hero-content h1 {
        font-size: 1.5rem;
        white-space: nowrap;
    }
    
    .hero-content h2 {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 0.8rem;
        line-height: 1.5;
        padding: 0 10px;
    }
    
    /* Logo - Bigger on mobile */
    .logo {
        font-size: 20px;
    }
    
    .logo .number {
        font-size: 28px;
    }
    
    .logo .text {
        font-size: 24px;
    }
    
    .logo .symbols {
        font-size: 25px;
    }
    
    /* Buttons */
    .hero-content .cta-buttons .btn {
        width: 90%;
        padding: 12px 25px;
        font-size: 13px;
    }
    
    .about-content .btn {
        width: 90%;
        padding: 12px 25px;
        font-size: 13px;
    }
    
    /* About Image */
    .about-img {
        max-width: 280px;
        padding: 15px;
    }
    
    /* Cards */
    .capability-card {
        padding: 20px 15px;
    }
    
    .card-icon {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    
    .capability-card h3 {
        font-size: 1.1rem;
    }
    
    /* Stats - Keep horizontal */
    .stats-row {
        flex-wrap: nowrap;
        gap: 8px;
    }
    
    .stat-item {
        min-width: 70px;
        padding: 12px 8px;
    }
    
    .stat-number {
        font-size: 1.4rem;
    }
    
    .stat-label {
        font-size: 0.65rem;
    }
    
    /* Project Cards */
    .project-card img {
        height: 180px;
    }
    
    .project-buttons .btn {
        padding: 8px 16px;
        font-size: 12px;
    }
    
    /* Contact */
    .contact-form .form-control {
        padding: 12px 15px;
    }
    
    /* Hero Social */
    .hero-social a {
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
}

/* ==============================================
   BREAKPOINT: VERY SMALL PHONES (max-width: 360px)
   ============================================== */
@media (max-width: 360px) {
    .hero-content h1 {
        font-size: 1.35rem;
        white-space: nowrap;
    }
    
    .hero-content h2 {
        font-size: 0.95rem;
    }
    
    .hero-description {
        font-size: 0.75rem;
        line-height: 1.4;
        padding: 0 8px;
    }
    
    .section-header h2 {
        font-size: 1.3rem;
    }
    
    .about-img {
        max-width: 250px;
    }
    
    .hero-content .cta-buttons .btn,
    .about-content .btn {
        padding: 11px 20px;
        font-size: 12px;
    }
    
    /* Stats - Keep horizontal on very small screens */
    .stats-row {
        flex-wrap: nowrap;
        gap: 6px;
    }
    
    .stat-item {
        min-width: 60px;
        padding: 10px 6px;
    }
    
    .stat-number {
        font-size: 1.2rem;
    }
    
    .stat-label {
        font-size: 0.6rem;
    }
}

/* ==============================================
   LANDSCAPE MODE FIXES
   ============================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        min-height: 0;
        padding: 80px 0 60px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .hero-content h2 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }
    
    .hero-content .cta-buttons {
        flex-direction: row;
        gap: 15px;
        margin-top: 20px;
    }
    
    .hero-content .cta-buttons .btn {
        width: auto;
        padding: 10px 25px;
    }
    
    .hero-social {
        margin-top: 20px;
    }
    
    .scroll-down-btn {
        display: none;
    }
}

/* ==============================================
   TOUCH DEVICE OPTIMIZATIONS
   ============================================== */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects that don't work well on touch */
    .btn:hover {
        transform: none;
    }
    
    .skill-card:hover {
        transform: none;
    }
    
    .capability-card:hover {
        transform: translateY(-4px);
    }
    
    .about-img img:hover {
        transform: none;
    }
    
    /* Ensure touch targets are large enough */
    .nav-links a {
        min-height: 48px;
    }
    
    .btn {
        min-height: 44px;
    }
    
    /* Social icons touch area */
    .hero-social a,
    .social-icons a {
        min-width: 44px;
        min-height: 44px;
    }
}

/* ==============================================
   PRINT STYLES
   ============================================== */
@media print {
    .side-nav,
    .nav-toggle-btn,
    #particles-js,
    .scroll-down-btn,
    .scroll-top-btn,
    .hero-social {
        display: none !important;
    }
    
    .hero-section {
        height: auto;
        min-height: 0;
        padding: 20px 0;
    }
    
    section.section {
        padding: 20px 0;
        break-inside: avoid;
    }
}