/* =============================================
   RESPONSIVE STYLES - Mobile, Tablet, Laptop
   Student-Friendly UI Enhancements
   © Situ Ghosh - All Rights Reserved
   ============================================= */

/* ===========================================
   MOBILE-FIRST BASE IMPROVEMENTS
   =========================================== */

/* Touch-friendly targets (minimum 44px) */
button,
.nav-btn,
.tool-btn,
.quick-card,
.feature-card,
.contact-item {
    min-height: 44px;
}

/* Smooth scrolling everywhere */
* {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

/* Prevent zoom on input focus (iOS) */
input,
select,
textarea {
    font-size: 16px !important;
}

/* Safe area for notched phones */
body {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

/* ===========================================
   TABLET STYLES (768px - 1024px)
   =========================================== */
@media (min-width: 768px) and (max-width: 1024px) {

    /* Navigation adjustments */
    .nav-container {
        padding: 10px 15px;
    }

    .nav-buttons {
        gap: 4px;
    }

    .nav-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .nav-btn span {
        display: inline-block;
    }

    /* Hero section */
    .hero-section {
        padding: 60px 30px;
    }

    .profile-name {
        font-size: 2.8rem;
    }

    .profile-image {
        width: 140px;
        height: 140px;
    }

    /* Grids - 2 columns on tablet */
    .quick-grid,
    .features-grid,
    .resources-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    /* Cards adjustments */
    .quick-card,
    .feature-card {
        padding: 25px;
    }

    /* Contact section */
    .contact-section {
        padding: 40px 30px;
    }

    .contact-info {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .contact-item {
        flex: 0 0 auto;
    }

    /* Main content */
    .main-content {
        padding: 30px 20px;
    }

    /* Page container */
    .page-container {
        padding: 25px 20px;
    }

    /* Tool pages - better layout */
    .split-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* Canvas/Editor full width on tablet */
    .canvas-container {
        height: 450px;
    }
}

/* ===========================================
   MOBILE STYLES (Below 768px)
   =========================================== */
@media (max-width: 767px) {

    /* Top bar smaller */
    .top-bar {
        padding: 5px 10px;
        font-size: 0.75rem;
    }

    /* Navigation - slide-out menu */
    .mobile-toggle {
        display: flex;
    }

    .nav-container {
        padding: 10px 15px;
    }

    .logo span {
        font-size: 1.1rem;
    }

    .logo i {
        font-size: 1.3rem;
        padding: 6px;
    }

    /* Hero section mobile */
    .hero-section {
        padding: 40px 15px 30px;
    }

    .profile-image {
        width: 110px;
        height: 110px;
        margin-bottom: 15px;
    }

    .profile-name {
        font-size: 2rem;
        letter-spacing: -0.5px;
    }

    .profile-title {
        font-size: 0.95rem;
        padding: 5px 15px;
        margin-bottom: 20px;
    }

    .welcome-text {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* Section headers */
    .section-header {
        margin-bottom: 20px;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .section-header i {
        font-size: 1.2rem;
    }

    /* Grids - single column */
    .quick-grid,
    .features-grid,
    .resources-grid,
    .work-items-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    /* Cards - more compact */
    .quick-card,
    .feature-card {
        padding: 20px;
    }

    .quick-card h3,
    .feature-card h3 {
        font-size: 1.1rem;
    }

    .quick-card p,
    .feature-card p {
        font-size: 0.9rem;
    }

    .quick-icon,
    .feature-icon {
        width: 45px;
        height: 45px;
        margin-bottom: 15px;
    }

    .quick-icon i,
    .feature-icon i {
        font-size: 1.2rem;
    }

    /* Contact section */
    .contact-section {
        padding: 30px 20px;
    }

    .contact-info {
        gap: 12px;
    }

    .contact-item {
        padding: 14px 18px;
        width: 100%;
    }

    /* Main content */
    .main-content {
        padding: 20px 15px;
    }

    /* Footer */
    .main-footer {
        padding: 25px 15px;
    }

    .main-footer p {
        font-size: 0.85rem;
    }

    /* Modal adjustments */
    .modal-content {
        padding: 25px 20px;
        width: 95%;
        max-width: none;
    }

    .modal-icon {
        width: 60px;
        height: 60px;
    }

    .modal-content h2 {
        font-size: 1.2rem;
    }

    .modal-buttons {
        flex-direction: column;
    }

    .modal-buttons button {
        width: 100%;
    }

    /* Page header */
    .page-header h1 {
        font-size: 1.4rem;
        flex-wrap: wrap;
    }

    /* Tool header */
    .tool-header {
        padding: 15px;
        flex-direction: column;
        align-items: flex-start;
    }

    .tool-actions {
        width: 100%;
        justify-content: flex-start;
    }

    /* Toolbar */
    .toolbar {
        padding: 10px;
        gap: 6px;
    }

    .tool-btn {
        width: 40px;
        height: 40px;
    }

    /* Canvas smaller */
    .canvas-container {
        height: 350px;
    }

    /* Editor/Preview panels */
    .editor-body,
    .preview-body {
        min-height: 300px;
    }

    /* Resource cards */
    .resource-card {
        padding: 20px;
    }

    .resource-icon {
        width: 45px;
        height: 45px;
        margin-bottom: 12px;
    }

    .resource-card h3 {
        font-size: 1.05rem;
    }

    .resource-meta {
        flex-direction: column;
        gap: 8px;
    }

    /* Chapter items */
    .chapter-item {
        padding: 12px 15px;
    }

    /* Split layout - stack vertically */
    .split-layout {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

/* ===========================================
   EXTRA SMALL MOBILE (Below 380px)
   =========================================== */
@media (max-width: 379px) {
    .profile-name {
        font-size: 1.7rem;
    }

    .profile-image {
        width: 90px;
        height: 90px;
    }

    .profile-title {
        font-size: 0.85rem;
    }

    .nav-container {
        padding: 8px 10px;
    }

    .logo span {
        font-size: 1rem;
    }

    .quick-card,
    .feature-card {
        padding: 15px;
    }

    .section-header h2 {
        font-size: 1.15rem;
    }
}

/* ===========================================
   LANDSCAPE MOBILE ORIENTATION
   =========================================== */
@media (max-width: 767px) and (orientation: landscape) {
    .hero-section {
        padding: 30px 20px;
    }

    .profile-container {
        display: flex;
        align-items: center;
        gap: 25px;
        text-align: left;
    }

    .profile-image {
        margin: 0;
        width: 100px;
        height: 100px;
        flex-shrink: 0;
    }

    .profile-name {
        font-size: 1.8rem;
    }

    /* Two column grids in landscape */
    .quick-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===========================================
   LARGE DESKTOP (Above 1400px)
   =========================================== */
@media (min-width: 1400px) {
    .main-content {
        padding: 50px 30px;
    }

    .quick-grid,
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .resources-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .quick-card,
    .feature-card {
        padding: 35px;
    }
}

/* ===========================================
   STUDENT-FRIENDLY UI ENHANCEMENTS
   =========================================== */

/* Larger, more readable fonts for younger students */
@media (max-width: 768px) {
    body {
        font-size: 15px;
        line-height: 1.6;
    }

    p,
    span,
    label {
        line-height: 1.6;
    }
}

/* Better button visibility */
.nav-btn,
.btn-primary,
.btn-secondary,
button {
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* Focus states for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Smooth hover transitions */
.quick-card,
.feature-card,
.resource-card,
.contact-item,
.nav-btn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Active state feedback for touch */
.quick-card:active,
.feature-card:active,
.nav-btn:active {
    transform: scale(0.98);
}

/* Prevent content shift on scroll */
html {
    overflow-y: scroll;
}

/* Hide scrollbar on mobile but allow scroll */
@media (max-width: 768px) {
    body {
        -ms-overflow-style: none;
        scrollbar-width: thin;
    }

    body::-webkit-scrollbar {
        width: 4px;
    }
}

/* Improve readability with better contrast */
.text-secondary,
.text-muted,
p {
    color: var(--text-secondary);
}

/* Loading state overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Pull-to-refresh visual indicator */
.pull-indicator {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    border-radius: 0 0 10px 10px;
    font-size: 0.85rem;
    transition: transform 0.3s;
    z-index: 1000;
}

/* Floating action button for mobile */
.fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s;
    display: none;
}

@media (max-width: 768px) {
    .fab {
        display: flex;
    }
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(79, 70, 229, 0.5);
}

.fab:active {
    transform: scale(0.95);
}

/* Bottom safe area for fixed elements */
.fixed-bottom {
    padding-bottom: env(safe-area-inset-bottom);
}

/* ===========================================
   PAGE-SPECIFIC RESPONSIVE STYLES
   =========================================== */

/* MATH AI PAGE */
@media (max-width: 768px) {
    .chat-sidebar {
        display: none !important;
    }

    .chat-container {
        padding: 15px 10px;
    }

    .message-content {
        max-width: 95% !important;
        font-size: 0.95rem;
    }

    .suggestion-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .suggestion-card {
        padding: 12px;
    }

    .welcome-screen h1 {
        font-size: 1.4rem;
    }

    .input-area-wrapper {
        padding: 10px 15px;
    }

    .math-input-box {
        border-radius: 20px;
    }
}

/* GEOGEBRA PAGE */
@media (max-width: 768px) {
    .geogebra-container {
        height: 400px !important;
    }

    .tool-actions-row {
        flex-direction: column;
    }

    .tool-actions-row button {
        width: 100%;
    }
}

/* WHITEBOARD PAGE */
@media (max-width: 768px) {
    .floating-dock {
        bottom: 10px !important;
        left: 5px !important;
        right: 5px !important;
        width: auto !important;
        transform: none !important;
        padding: 8px !important;
        border-radius: 15px !important;
        gap: 5px !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
    }

    .dock-btn {
        width: 36px !important;
        height: 36px !important;
        font-size: 0.9rem !important;
    }

    .color-palette {
        flex-wrap: wrap !important;
        justify-content: center !important;
        gap: 4px !important;
    }

    .color-dot {
        width: 24px !important;
        height: 24px !important;
    }

    .slide-controls {
        display: flex;
        gap: 3px !important;
    }

    .slide-counter {
        font-size: 0.7rem !important;
        padding: 0 5px !important;
    }

    .dock-separator {
        display: none !important;
    }

    .canvas-container {
        height: calc(100vh - 200px) !important;
    }

    .magic-box-content {
        padding: 15px !important;
        max-height: 80vh;
        overflow-y: auto;
    }

    .magic-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px !important;
    }
}

/* LATEX EDITOR PAGE */
@media (max-width: 1024px) {
    .lab-workspace {
        flex-direction: column;
    }

    .lab-editor-pane {
        width: 100% !important;
        min-width: auto !important;
        height: 50vh;
    }

    .lab-preview-pane {
        height: 50vh;
    }

    .academic-paper {
        width: 100% !important;
        min-height: auto !important;
        padding: 15mm 10mm !important;
    }
}

@media (max-width: 768px) {
    .lab-sidebar {
        width: 50px !important;
        padding-top: 10px;
    }

    .side-btn {
        width: 38px !important;
        height: 38px !important;
        font-size: 1rem !important;
        margin-bottom: 10px !important;
    }

    .side-btn::after {
        display: none !important;
    }

    .symbol-toolbar {
        padding: 5px !important;
        gap: 8px !important;
    }

    .symbol-btn {
        padding: 4px 6px !important;
        font-size: 0.85rem !important;
    }

    .preview-content {
        padding: 10px !important;
    }
}

/* ADD HTML PAGE */
@media (max-width: 768px) {
    .html-sidebar {
        width: 50px !important;
        padding: 10px 5px !important;
    }

    .tool-btn {
        width: 36px !important;
        height: 36px !important;
    }

    .main-editor-area {
        flex-direction: column;
    }

    .code-panel,
    .preview-panel {
        width: 100% !important;
        height: 50vh !important;
    }
}

/* RESOURCES PAGE */
@media (max-width: 768px) {
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-bar select {
        width: 100%;
    }

    .sync-indicator {
        justify-content: center;
    }

    .resources-grid {
        grid-template-columns: 1fr !important;
    }

    .resource-card {
        padding: 15px;
    }

    .viewer-content {
        padding: 10px;
    }

    .ai-solution-view {
        padding: 20px !important;
        font-size: 1rem !important;
    }

    .ai-solution-view::before {
        left: 20px !important;
    }

    .ai-solution-view .section-content,
    .ai-solution-view .section-label {
        padding-left: 30px !important;
    }
}

/* Print styles hidden on small screens */
@media print {

    .mobile-toggle,
    .fab,
    .nav-overlay {
        display: none !important;
    }
}