/* Responsive Media Breakpoints for SalinKamay Proper Web Layout */

/* Mobile navigation is mounted by mobile-nav.js; desktop navbar stays intact. */
.mobile-navigation { display: none; }

/* Large Screens & Desktops */
@media (min-width: 992px) {
    .container {
        padding: 0 40px;
    }

    .home-stage {
        height: calc(100vh - 148px);
        min-height: 0;
        padding: 24px 0 28px;
        overflow: hidden;
    }

    .translator-stage {
        height: calc(100vh - 76px - 69px);
        padding: 24px 0 28px;
        overflow: visible;
        display: flex;
        flex-direction: column;
    }

    .translator-stage > .container {
        height: 100%;
        min-height: 0;
        overflow: visible;
    }

    .translator-stage .translation-pane.active {
        height: calc(100% - 58px);
        overflow: visible;
    }

    .translator-stage .translate-split-grid {
        height: 100%;
        max-height: none;
    }
}

/* Medium Screens & Tablets (max-width: 991px) */
@media (max-width: 991px) {
    .app-title {
        font-size: 2.75rem;
    }

    .landing-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        align-items: start;
    }

    .translate-split-grid {
        grid-template-columns: 1.1fr 1fr;
        gap: 24px;
    }

    .lesson-split-grid {
        grid-template-columns: 1.1fr 1fr;
        gap: 24px;
    }

    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }

    .app-content {
        padding-top: 36px;
    }

    /* Navbar — box style pa rin sa tablet */
    .nav-container {
        height: 72px;
        padding: 0 16px;
    }

    .nav-logo {
        font-size: 1.25rem;
    }

    .nav-logo img {
        height: 44px !important;
        width: 44px !important;
    }

    .nav-menu {
        gap: 8px;
    }

    .nav-link {
        padding: 8px 14px;
        font-size: 0.875rem;
        border-width: 2px;
    }
}

/* Small Screens & Mobile Devices (max-width: 767px) */
@media (max-width: 767px) {
    .navbar > .nav-container { display: none; }
    .navbar { display: none; }
    .mobile-navigation { display: block; }
    .mobile-header {
        position: fixed; z-index: 1100; top: max(10px, env(safe-area-inset-top)); left: 16px; right: 16px;
        height: 64px; padding: 8px 12px 8px 14px; display: flex; align-items: center; justify-content: space-between;
        background: #FFFBDF; border: 1px solid #d5e8e5; border-radius: 16px;
        box-shadow: 0 5px 18px rgba(23, 52, 58, .09); backdrop-filter: blur(12px);
    }
    .mobile-brand { display: inline-flex; align-items: center; gap: 9px; min-width: 0; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 1.15rem; letter-spacing: -.04em; }
    .mobile-brand img { width: 40px; height: 40px; object-fit: contain; border-radius: 50%; }
    .mobile-nav-button { width: 48px; height: 48px; display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 12px; color: var(--ink); background: transparent; cursor: pointer; }
    .mobile-nav-button:focus-visible, .mobile-nav-link:focus-visible, .mobile-bottom-link:focus-visible { outline: 3px solid rgba(15,159,120,.45); outline-offset: 2px; }
    .mobile-nav-button svg { width: 25px; height: 25px; }
    .mobile-drawer-layer { position: fixed; inset: 0; z-index: 1200; visibility: hidden; pointer-events: none; }
    .mobile-drawer-layer.is-open { visibility: visible; pointer-events: auto; }

    .mobile-drawer-layer.is-open .mobile-drawer-backdrop { opacity: 1; }
    .mobile-drawer { position: absolute; top: max(8px, env(safe-area-inset-top, 0px)); right: 0; bottom: auto; width: min(82vw, 340px); max-height: calc(100vh - 24px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px)); max-height: calc(100dvh - 24px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px)); overflow-y: auto; overscroll-behavior: contain; padding: 16px 16px max(20px, env(safe-area-inset-bottom, 0px)); background: var(--background); border-radius: 18px 0 0 18px; box-shadow: -12px 0 36px rgba(18, 51, 56, .2); transform: translateX(102%); transition: transform .3s cubic-bezier(.2,.8,.2,1); }
    .mobile-drawer-layer.is-open .mobile-drawer { transform: translateX(0); }
    .mobile-drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 0 2px 20px; border-bottom: 1px solid #e6eeec; }
    .mobile-drawer-header .mobile-brand { font-size: 1.04rem; }
    .mobile-drawer-header .mobile-brand img { width: 36px; height: 36px; }
    .mobile-drawer-nav { display: grid; gap: 4px; padding-top: 18px; }
    .mobile-nav-link { min-height: 52px; padding: 0 14px; display: flex; align-items: center; gap: 13px; border-radius: 10px; color: #526b72; text-decoration: none; font-size: .95rem; font-weight: 500; }
    .mobile-nav-link svg { width: 20px; height: 20px; flex: 0 0 auto; }
    .mobile-nav-link[aria-current="page"] { color: #FFFBDF; background:#FFFBDF; font-weight: 700; }
    .mobile-bottom-nav { position: fixed; z-index: 1050; bottom: 0; left: 12px; right: 12px; padding: 7px 8px calc(7px + env(safe-area-inset-bottom)); display: grid; grid-template-columns: repeat(3, 1fr); background: rgba(255,255,255,.98); border: 1px solid #d8e8e5; border-bottom: 0; border-radius: 16px 16px 0 0; box-shadow: 0 -5px 20px rgba(23,52,58,.1); }
    .mobile-bottom-link { min-height: 58px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; color: #71868a; text-decoration: none; font-size: .7rem; font-weight: 500; }
    .mobile-bottom-link svg { width: 23px; height: 23px; }
    .mobile-bottom-link[aria-current="page"] { color: #ffffff; font-weight: 700; }
    body.mobile-nav-open { overflow: hidden; }
    body { padding-top: 84px; padding-bottom: calc(82px + env(safe-area-inset-bottom)); }
    .app-content { padding-bottom: 40px; }
    .app-content.landing-page { padding-bottom: 0; }
    html {
        font-size: 15px;
    }

    body {
        padding-top: 0;
        font-size: 0.95rem;
        overflow-x: hidden;
    }

    .navbar {
        position: sticky;
        top: 0;
    }

    /* ✅ MOBILE NAVBAR — TAB LAYOUT NA MAY BOX
       Logo sa taas (centered), nav links sa ibaba (rectangle box) */
    .nav-container {
        flex-direction: column;
        height: auto;
        min-height: 0;
        padding: 12px 12px 14px;
        gap: 10px;
        align-items: center;
        justify-content: center;
        flex-wrap: nowrap;
    }

    /* ✅ Logo — icon lang (itago yung text) */
    .nav-logo {
        font-size: 1.15rem;
        gap: 6px;
        flex-shrink: 0;
    }

    .nav-logo img {
        height: 44px !important;
        width: 44px !important;
        margin-right: 0 !important;
    }

    .nav-logo-text {
        display: none;
    }

    /* ✅ Nav menu — horizontal tabs na may box */
    .nav-menu {
        width: 100%;
        justify-content: center;
        gap: 6px;
        padding: 0;
        border-top: none;
        flex-wrap: nowrap;
    }

    /* ✅ Nav links — MAY BOX pa rin */
    .nav-link {
        flex: 1;
        display: inline-flex;
        justify-content: center;
        align-items: center;
        padding: 8px 10px;
        font-size: 0.75rem;
        font-weight: 700;
        color: var(--text);
        background-color: #FFFBDF;
        border: 2px solid var(--border);
        border-radius: var(--radius-md);
        box-shadow: 0 1px 3px rgba(24, 36, 43, 0.04);
        gap: 0;
        position: relative;
        text-decoration: none;
        letter-spacing: -0.01em;
        min-width: 0;
        white-space: nowrap;
    }

    .nav-link:hover {
        color: var(--primary-hover);
        background-color: var(--primary-light);
        border-color: var(--primary);
        transform: translateY(-1px);
        box-shadow: 0 4px 10px rgba(15, 159, 120, 0.15);
    }

    /* ✅ Active — solid green fill */
    .nav-link.active {
        color: #ffffff;
        background: linear-gradient(135deg, var(--primary), #18b487);
        border-color: var(--primary-hover);
        box-shadow: 0 4px 12px rgba(16, 185, 129, 0.32);
        font-weight: 700;
    }

    /* ✅ Underline sa active */
    .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: -6px;
        left: 50%;
        transform: translateX(-50%);
        width: 60%;
        height: 3px;
        background-color: var(--primary);
        border-radius: 2px;
        transition: var(--transition);
    }

    /* ✅ Hover underline sa non-active */
    .nav-link:not(.active)::after {
        content: '';
        position: absolute;
        bottom: -6px;
        left: 50%;
        transform: translateX(-50%) scaleX(0);
        width: 60%;
        height: 3px;
        background-color: var(--primary);
        border-radius: 2px;
        transition: var(--transition);
    }

    .nav-link:not(.active):hover::after {
        transform: translateX(-50%) scaleX(1);
    }

    /* ✅ LANDING PAGE — i-scale down para fit sa mobile */
    .landing-page {
        min-height: auto;
        padding: 20px 0;
    }

    .landing-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
        align-items: center;
    }

    .landing-hero-content {
        align-items: center;
        width: 100%;
    }

    .app-tagline {
        font-size: 0.7rem;
        letter-spacing: 0.08em;
        margin-bottom: 8px;
    }

    .app-title {
        font-size: 1.85rem;
        margin-bottom: 14px;
        line-height: 1.15;
        max-width: 100%;
        letter-spacing: -0.01em;
    }

    .app-description {
        font-size: 0.9rem;
        margin-bottom: 24px;
        line-height: 1.55;
        max-width: 100%;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 10px;
        max-width: 100%;
        width: 100%;
    }

    .cta-buttons .btn {
        width: 100%;
        font-size: 0.95rem;
        padding: 12px 20px;
    }

    /* ✅ BCES preview card — i-scale down */
    .landing-hero-preview {
        width: 100%;
    }

    .preview-interface-card {
        max-width: 100%;
        width: 100%;
    }

    .preview-header {
        padding: 10px 14px;
    }

    .preview-title {
        font-size: 0.7rem;
    }

    .bces-viewport {
        padding: 20px 16px 60px 16px;
        min-height: 220px;
    }

    .bces-logo-image {
        max-width: 140px;
        max-height: 140px;
    }

    .bces-glow-backdrop {
        width: 220px;
        height: 220px;
    }

    .preview-results-overlay {
        padding: 10px 14px;
    }

    .preview-output-text {
        font-size: 1rem;
    }

    .preview-badge {
        font-size: 0.65rem;
    }

    /* Other grids */
    .translate-split-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .app-content {
        padding: 24px 0 40px;
    }

    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .lesson-split-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }

    .card {
        height: 140px;
    }

    .page-title {
        font-size: 1.35rem;
    }

    .section-header-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .result-card, .input-card, .animation-card, .details-card {
        padding: 20px;
        min-height: auto;
    }

    .prediction-text {
        font-size: 1.75rem;
        overflow-wrap: anywhere;
    }

    .input-actions {
        flex-direction: column;
        gap: 10px;
    }

    .animation-actions {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        gap: 16px;
    }

    .animation-actions .btn {
        width: 100%;
    }

    .search-bar-container {
        margin-bottom: 24px;
    }

    .page-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
    }

    .curriculum-header {
        align-items: center;
        text-align: center;
    }

    .curriculum-header .page-header-text {
        width: 100%;
    }
}

/* Extra Small Phones (max-width: 480px) */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    /* ✅ Navbar — mas compact pero may box */
    .nav-container {
        padding: 10px 10px 12px;
        gap: 8px;
    }

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

    .nav-logo img {
        height: 40px !important;
        width: 40px !important;
    }

    .nav-menu {
        gap: 5px;
    }

    .nav-link {
        padding: 7px 8px;
        font-size: 0.68rem;
        border-width: 1.5px;
    }

    .nav-link.active::after,
    .nav-link:not(.active)::after {
        bottom: -5px;
        height: 2px;
    }

    /* ✅ Landing page — mas maliit */
    .app-title {
        font-size: 1.55rem;
        margin-bottom: 12px;
    }

    .app-tagline {
        font-size: 0.65rem;
    }

    .app-description {
        font-size: 0.85rem;
        margin-bottom: 20px;
    }

    .cta-buttons .btn {
        font-size: 0.9rem;
        padding: 11px 18px;
    }

    .bces-logo-image {
        max-width: 120px;
        max-height: 120px;
    }

    .bces-glow-backdrop {
        width: 180px;
        height: 180px;
    }

    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
    }

    .card {
        height: 130px;
    }

    .btn,
    .btn-lg {
        font-size: 0.9rem;
        padding: 11px 18px;
    }
}

/* Very Small Phones (max-width: 380px) */
@media (max-width: 380px) {
    html {
        font-size: 13px;
    }

    /* ✅ Navbar — pinaka-compact, box pa rin */
    .nav-container {
        padding: 8px 8px 10px;
        gap: 6px;
    }

    .nav-logo img {
        height: 36px !important;
        width: 36px !important;
    }

    .nav-menu {
        gap: 4px;
    }

    .nav-link {
        padding: 6px 5px;
        font-size: 0.6rem;
        border-width: 1.5px;
        border-radius: var(--radius-sm);
        letter-spacing: -0.02em;
    }

    .nav-link.active::after,
    .nav-link:not(.active)::after {
        bottom: -4px;
        height: 2px;
    }

    /* ✅ Landing page — pinaka-compact */
    .app-title {
        font-size: 1.35rem;
        margin-bottom: 10px;
    }

    .app-tagline {
        font-size: 0.6rem;
        letter-spacing: 0.05em;
    }

    .app-description {
        font-size: 0.8rem;
        margin-bottom: 18px;
        line-height: 1.5;
    }

    .cta-buttons {
        gap: 8px;
    }

    .cta-buttons .btn {
        font-size: 0.85rem;
        padding: 10px 14px;
    }

    .bces-logo-image {
        max-width: 100px;
        max-height: 100px;
    }

    .bces-glow-backdrop {
        width: 150px;
        height: 150px;
    }

    .bces-viewport {
        padding: 16px 12px 50px 12px;
        min-height: 180px;
    }

    .preview-output-text {
        font-size: 0.9rem;
    }

    .cards-grid {
        grid-template-columns: 1fr;
    }

    .card {
        height: auto;
        aspect-ratio: 16 / 9;
    }

    .btn,
    .btn-lg {
        padding-left: 14px;
        padding-right: 14px;
    }
}

/* ✅ Very very small phones (max-width: 320px) — iPhone SE 1st gen */
@media (max-width: 320px) {
    html {
        font-size: 12px;
    }

    .nav-container {
        padding: 6px 6px 8px;
        gap: 5px;
    }

    .nav-logo img {
        height: 32px !important;
        width: 32px !important;
    }

    .nav-menu {
        gap: 3px;
    }

    .nav-link {
        padding: 5px 4px;
        font-size: 0.55rem;
        border-width: 1px;
        border-radius: 4px;
    }

    .nav-link.active::after,
    .nav-link:not(.active)::after {
        bottom: -3px;
        height: 2px;
    }

    .app-title {
        font-size: 1.2rem;
    }

    .app-tagline {
        font-size: 0.55rem;
    }

    .app-description {
        font-size: 0.75rem;
    }

    .cta-buttons .btn {
        font-size: 0.8rem;
        padding: 9px 12px;
    }

    .bces-logo-image {
        max-width: 90px;
        max-height: 90px;
    }

    .bces-glow-backdrop {
        width: 130px;
        height: 130px;
    }

    .bces-viewport {
        padding: 14px 10px 44px 10px;
        min-height: 160px;
    }

    .preview-output-text {
        font-size: 0.8rem;
    }

    .preview-badge {
        font-size: 0.6rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

/* Hide the landing footer on phones, including short landscape phone viewports. */
@media (max-width: 767px), (max-height: 500px) and (orientation: landscape) and (pointer: coarse) {
    .landing-footer { display: none; }
}

/* Shared mobile viewport clearance for every page using the fixed mobile nav. */
@media (max-width: 767px) {
    html {
        --mobile-header-height: clamp(60px, 14vw, 68px);
        --mobile-bottom-nav-height: clamp(70px, 18vw, 78px);
        --mobile-layout-gap: clamp(8px, 2vw, 12px);
        --mobile-header-safe-top: max(10px, env(safe-area-inset-top, 0px));
        --mobile-content-inset-top: calc(var(--mobile-header-safe-top) + var(--mobile-header-height) + var(--mobile-layout-gap));
        --mobile-content-inset-bottom: calc(var(--mobile-bottom-nav-height) + env(safe-area-inset-bottom, 0px) + var(--mobile-layout-gap));
        scroll-padding-top: var(--mobile-content-inset-top);
        scroll-padding-bottom: var(--mobile-content-inset-bottom);
        min-height: 100%;
        height: auto;
    }

    body {
        min-height: 100vh;
        min-height: 100dvh;
        padding-top: var(--mobile-content-inset-top);
        padding-bottom: var(--mobile-content-inset-bottom);
        overflow-x: hidden;
    }

    .mobile-header {
        top: var(--mobile-header-safe-top);
        height: var(--mobile-header-height);
    }

    .mobile-bottom-nav {
        height: calc(var(--mobile-bottom-nav-height) + env(safe-area-inset-bottom, 0px));
        padding: 7px 8px calc(7px + env(safe-area-inset-bottom, 0px));
    }

    .mobile-bottom-link {
        height: calc(var(--mobile-bottom-nav-height) - 15px);
        min-height: 0;
    }

    /* Body padding owns all fixed-nav clearance; mains add no duplicate spacing. */
    .app-content {
        padding-top: 0;
        padding-bottom: 0;
        scroll-margin-top: var(--mobile-content-inset-top);
    }

    .app-content.landing-page { padding-top: 0; padding-bottom: 0; }

    :where(a, button, input, select, textarea, [tabindex]) {
        scroll-margin-top: var(--mobile-content-inset-top);
        scroll-margin-bottom: var(--mobile-content-inset-bottom);
    }
}

/* Shared navigation and footer color treatment. Keep geometry in the rules above. */
.navbar {
    background-color: var(--navigation-green);
    border-bottom-color: rgba(255, 255, 255, .24);
    box-shadow: 0 3px 12px rgba(20, 48, 52, .2);
}
.nav-logo { color: #fff; }
.nav-logo-text {
    background: none;
    color: #fff;
    -webkit-text-fill-color: #fff;
}
.nav-logo img {
    background: #fff;
    border-radius: 50%;
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, .18));
}
.nav-link {
    color: #fff;
    background: transparent;
    border-color: rgba(255, 255, 255, .34);
    box-shadow: none;
}
.nav-link:hover {
    color: #fff;
    background: var(--navigation-green-hover);
    border-color: rgba(255, 255, 255, .75);
    box-shadow: 0 4px 10px rgba(20, 48, 52, .18);
}
.nav-link:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
.nav-link.active {
    color: #fff;
    background: var(--navigation-active);
    border-color: var(--navigation-active);
    box-shadow: 0 3px 10px rgba(20, 48, 52, .2);
}
.nav-link.active::after { background-color: var(--navigation-active); }
.nav-link:not(.active)::after { background-color: var(--navigation-active); }
.landing-footer {
    background-color: var(--navigation-green);
    border-top-color: rgba(255, 255, 255, .24);
    color: #fff;
    box-shadow: 0 -3px 12px rgba(20, 48, 52, .16);
}

@media (min-width: 768px) {
    .nav-link.active {
        color: var(--navigation-green);
        background: #fff;
        border-color: #fff;
        box-shadow: 0 3px 10px rgba(20, 48, 52, .2);
    }
    .nav-link.active::after { background-color: #fff; }
}

@media (max-width: 767px) {
    .mobile-drawer-layer { z-index: 1200; }
    .mobile-drawer-backdrop {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        z-index: 0;
        padding: 0;
        border: 0;
        background: rgba(23, 52, 58, .38);
        opacity: 0;
        transition: opacity .3s ease;
        cursor: pointer;
    }
    .mobile-drawer {
        z-index: 1;
        top: max(8px, env(safe-area-inset-top, 0px));
        right: 0;
        bottom: auto;
        max-height: calc(100vh - 24px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
        max-height: calc(100dvh - 24px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
        overflow-y: auto;
        overscroll-behavior: contain;
        padding: 16px 16px max(20px, env(safe-area-inset-bottom, 0px));
        background-color: #ffffff;
        border-radius: 18px 0 0 18px;
        isolation: isolate;
    }
    .mobile-header {
        background: var(--navigation-green);
        border-color: rgba(255, 255, 255, .34);
        box-shadow: 0 5px 18px rgba(20, 48, 52, .24);
    }
    .mobile-brand { color: #fff; }
    .mobile-header .mobile-nav-button { color: #fffbdf; }
    .mobile-brand img {
        background: #fff;
        border-radius: 50%;
        filter: drop-shadow(0 2px 5px rgba(0, 0, 0, .18));
    }
    .mobile-nav-button:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }
    .mobile-drawer-header {
        background: transparent;
        border-bottom-color: var(--navigation-green);
    }
    .mobile-drawer-header .mobile-brand,
    .mobile-drawer-header .mobile-nav-button { color: var(--ink); }
    .mobile-drawer-header .mobile-brand img {
        background: #fff;
        border-radius: 50%;
    }
    .mobile-nav-link[aria-current="page"] {
        color: var(--navigation-green);
        background: var(--primary-light);
    }
    .mobile-nav-link:hover {
        color: var(--navigation-green);
        background: var(--primary-light);
        font-weight: 700;
    }
    .mobile-bottom-nav {
        background: var(--navigation-green);
        border-color: rgba(255, 255, 255, .34);
        box-shadow: 0 -5px 20px rgba(20, 48, 52, .24);
    }
    .mobile-bottom-link { color: rgba(255, 255, 255, .94); }
    .mobile-bottom-link[aria-current="page"] {
        color: var(--navigation-green);
        background: #fff;
        border-radius: 10px;
    }
    .mobile-bottom-link:hover {
        color: var(--navigation-green);
        background: #fff;
        border-radius: 10px;
    }
    .mobile-nav-link:focus-visible { outline-color: var(--navigation-green); }
    .mobile-bottom-link:focus-visible { outline-color: #fff; }
}