/* ============================================
   RESPONSIVE UTILITIES - iNTERCEPT
   Shared responsive foundation for all pages
   ============================================ */

/* ============== CSS VARIABLES ============== */
:root {
    /* Touch targets */
    --touch-min: 44px;
    --touch-comfortable: 48px;

    /* Responsive spacing */
    --spacing-xs: clamp(4px, 1vw, 8px);
    --spacing-sm: clamp(8px, 2vw, 12px);
    --spacing-md: clamp(12px, 3vw, 20px);
    --spacing-lg: clamp(16px, 4vw, 32px);

    /* Responsive typography */
    --font-xs: clamp(10px, 2.5vw, 11px);
    --font-sm: clamp(11px, 2.8vw, 12px);
    --font-base: clamp(13px, 3vw, 14px);
    --font-md: clamp(14px, 3.5vw, 16px);
    --font-lg: clamp(16px, 4vw, 20px);
    --font-xl: clamp(20px, 5vw, 28px);
    --font-2xl: clamp(24px, 6vw, 40px);

    /* Header height for calculations */
    --header-height: 52px;
    --nav-height: 44px;
}

@media (min-width: 768px) {
    :root {
        --header-height: 60px;
        --nav-height: 48px;
    }
}

@media (min-width: 1024px) {
    :root {
        --header-height: 96px;
        --nav-height: 0px;
    }
}

/* ============== VIEWPORT HEIGHT FIX ============== */
/* Handles iOS Safari address bar and dynamic viewport */
.full-height {
    height: 100dvh;
    height: 100vh; /* Fallback */
}

@supports (-webkit-touch-callout: none) {
    .full-height {
        height: -webkit-fill-available;
    }
}

/* ============== HAMBURGER BUTTON ============== */
.hamburger-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: var(--touch-min);
    height: var(--touch-min);
    padding: 10px;
    background: transparent;
    border: 1px solid var(--border-color, #1f2937);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    z-index: 1001;
    flex-shrink: 0;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.hamburger-btn:hover {
    background: var(--bg-tertiary, #151a23);
    border-color: var(--accent-cyan, #4a9eff);
}

.hamburger-btn span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--accent-cyan, #4a9eff);
    margin: 2px 0;
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.hamburger-btn.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* Hide hamburger on desktop */
@media (min-width: 1024px) {
    .hamburger-btn {
        display: none;
    }
}

/* ============== MOBILE DRAWER ============== */
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: min(320px, 85vw);
    height: 100dvh;
    height: 100vh; /* Fallback */
    background: var(--bg-secondary, #0f1218);
    border-right: 1px solid var(--border-color, #1f2937);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-top: 60px;
}

.mobile-drawer.open {
    transform: translateX(0);
}

/* Show sidebar normally on desktop */
@media (min-width: 1024px) {
    .mobile-drawer {
        position: static;
        transform: none;
        width: auto;
        height: auto;
        padding-top: 0;
        z-index: auto;
    }
}

/* ============== DRAWER OVERLAY ============== */
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 999;
}

.drawer-overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* Hide overlay on desktop */
@media (min-width: 1024px) {
    .drawer-overlay {
        display: none;
    }
}

/* ============== TOUCH TARGETS ============== */
@media (max-width: 1023px) {
    /* Ensure minimum touch target size for interactive elements */
    button,
    .btn,
    .preset-btn,
    .mode-nav-btn,
    .control-btn,
    .nav-action-btn,
    .icon-btn {
        min-height: var(--touch-min);
        min-width: var(--touch-min);
    }

    select,
    input[type="text"],
    input[type="number"],
    input[type="search"] {
        min-height: var(--touch-min);
        padding: 10px 12px;
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    .checkbox-group label,
    .radio-group label {
        min-height: var(--touch-min);
        padding: 10px 14px;
        display: flex;
        align-items: center;
    }
}

/* ============== RESPONSIVE UTILITIES ============== */
/* Hide on mobile */
.hide-mobile {
    display: none;
}

@media (min-width: 768px) {
    .hide-mobile {
        display: initial;
    }
}

/* Hide on tablet and up */
.show-mobile-only {
    display: initial;
}

@media (min-width: 768px) {
    .show-mobile-only {
        display: none;
    }
}

/* Hide on desktop */
.hide-desktop {
    display: initial;
}

@media (min-width: 1024px) {
    .hide-desktop {
        display: none;
    }
}

/* Show only on desktop */
.show-desktop-only {
    display: none;
}

@media (min-width: 1024px) {
    .show-desktop-only {
        display: initial;
    }
}

/* ============== SCROLLABLE AREAS ============== */
.scroll-x {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}

.scroll-x::-webkit-scrollbar {
    height: 4px;
}

.scroll-x::-webkit-scrollbar-thumb {
    background: var(--border-color, #1f2937);
    border-radius: 2px;
}

/* Hide scrollbar on mobile for cleaner look */
@media (max-width: 767px) {
    .scroll-x-mobile-hidden {
        scrollbar-width: none;
    }

    .scroll-x-mobile-hidden::-webkit-scrollbar {
        display: none;
    }
}

/* ============== MOBILE NAVIGATION BAR ============== */
.mobile-nav-bar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: var(--bg-tertiary, #151a23);
    border-bottom: 1px solid var(--border-color, #1f2937);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.mobile-nav-bar::-webkit-scrollbar {
    display: none;
}

.mobile-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--bg-card, #121620);
    border: 1px solid var(--border-color, #1f2937);
    border-radius: 6px;
    color: var(--text-secondary, #9ca3af);
    font-size: var(--font-xs);
    font-family: inherit;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 36px;
}

.mobile-nav-btn:hover,
.mobile-nav-btn.active {
    background: var(--bg-elevated, #1a202c);
    border-color: var(--accent-cyan, #4a9eff);
    color: var(--text-primary, #e8eaed);
}

.mobile-nav-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Hide mobile nav bar on desktop */
@media (min-width: 1024px) {
    .mobile-nav-bar {
        display: none;
    }
}

/* ============== RESPONSIVE GRID UTILITIES ============== */
.grid-responsive {
    display: grid;
    gap: var(--spacing-sm);
}

/* 1 column base */
.grid-1-2 {
    grid-template-columns: 1fr;
}

@media (min-width: 480px) {
    .grid-1-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-2-3 {
    grid-template-columns: repeat(2, 1fr);
}

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

/* ============== TYPOGRAPHY RESPONSIVE ============== */
.text-responsive-xs { font-size: var(--font-xs); }
.text-responsive-sm { font-size: var(--font-sm); }
.text-responsive-base { font-size: var(--font-base); }
.text-responsive-md { font-size: var(--font-md); }
.text-responsive-lg { font-size: var(--font-lg); }
.text-responsive-xl { font-size: var(--font-xl); }
.text-responsive-2xl { font-size: var(--font-2xl); }

/* Ensure minimum readable sizes for tiny text */
.text-min-readable {
    font-size: max(10px, var(--font-xs));
}