@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* ================================================
   ROOT & VARIABLES
   ================================================ */
:root {
    --primary-dark: #1f2937;
    --border-dashed: #d1d5db;
    --accent-purple: #7c3aed;
    --accent-emerald: #10b981;
    --transition-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-brutal: 4px 4px 0px 0px var(--primary-dark);
    --shadow-brutal-hover: 6px 6px 0px 0px var(--primary-dark);
}

/* ================================================
   BASE
   ================================================ */
*, *::before, *::after {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #ffffff;
    background-image: radial-gradient(circle, rgba(229, 231, 235, 0.45) 1px, transparent 1px);
    background-size: 28px 28px;
    transition: opacity var(--transition-smooth);
    overflow-x: hidden;
}

body.noscroll {
    overflow: hidden;
}

/* ================================================
   PAGE LOADER
   ================================================ */
.page-loader {
    position: fixed;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity var(--transition-smooth);
    will-change: opacity;
    backface-visibility: hidden;
}

.loader {
    width: 36px;
    height: 36px;
    border: 3px solid #eee;
    border-radius: 50%;
    border-top: 3px solid var(--primary-dark);
    animation: spin 0.7s linear infinite;
    will-change: transform;
    transform: translateZ(0);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ================================================
   INDUSTRIAL BANNER
   ================================================ */
.industrial-banner {
    border: 2px dashed var(--border-dashed);
    position: relative;
    background: white;
    border-radius: 2px;
}

.dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--primary-dark);
    border-radius: 50%;
    z-index: 10;
}

/* Corner labels (absolute inside banner) */
.corner-label {
    position: absolute;
    z-index: 5;
}

/* Author badge */
.author-badge {
    border-radius: 3px;
    letter-spacing: 0.15em;
}

/* ================================================
   NAVBAR
   ================================================ */
nav {
    will-change: transform;
    backface-visibility: hidden;
}

nav a {
    transition: all var(--transition-base);
    will-change: color;
}

nav a.active {
    border-bottom: 2px solid white;
}

/* ================================================
   HAMBURGER MENU
   ================================================ */
.hamburger {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.hamburger:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: scale(1.05);
}

.hamburger-inner {
    width: 20px;
    height: 14px;
    position: relative;
}

.hamburger-inner span {
    display: block;
    position: absolute;
    height: 2px;
    background: white;
    border-radius: 2px;
    left: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger-inner span:nth-child(1) { top: 0; width: 100%; }
.hamburger-inner span:nth-child(2) { top: 6px; width: 72%; }
.hamburger-inner span:nth-child(3) { top: 12px; width: 100%; }

/* Hamburger → X */
.hamburger.active .hamburger-inner span:nth-child(1) {
    top: 6px;
    transform: rotate(45deg);
    width: 100%;
}
.hamburger.active .hamburger-inner span:nth-child(2) {
    opacity: 0;
    transform: translateX(-16px);
}
.hamburger.active .hamburger-inner span:nth-child(3) {
    top: 6px;
    transform: rotate(-45deg);
    width: 100%;
}
.hamburger.active {
    background: rgba(239, 68, 68, 0.18);
}

/* ================================================
   MOBILE MENU + OVERLAY
   ================================================ */
.mobile-menu {
    position: fixed;
    top: 64px;
    right: -100%;
    width: 320px;
    height: calc(100vh - 64px);
    background: white;
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.1);
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 40;
    overflow-y: auto;
    /* subtle border on left edge */
    border-left: 1px solid #f3f4f6;
}

.mobile-menu.active {
    right: 0;
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-smooth);
    z-index: 39;
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Menu item left-border accent on hover / active */
.menu-item {
    position: relative;
}

.menu-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    bottom: 12px;
    width: 3px;
    background: var(--primary-dark);
    border-radius: 0 3px 3px 0;
    transform: scaleY(0);
    transition: transform var(--transition-smooth);
    transform-origin: center;
}

.menu-item:hover::before {
    transform: scaleY(1);
}

.menu-item.active::before {
    background: white;
    transform: scaleY(1);
}

/* GitHub link hover */
.github-link {
    transition: background var(--transition-base), transform var(--transition-base);
}
.github-link:hover {
    background: #111827;
    transform: translateY(-1px);
}

/* Stats card */
.stats-card {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid #e2e8f0;
}

.stats-item {
    transition: box-shadow var(--transition-base);
}
.stats-item:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* ================================================
   LIVE DOT ANIMATION
   ================================================ */
.live-dot {
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

/* ================================================
   SEARCH INPUT
   ================================================ */
.search-input {
    border-radius: 4px;
    background-size: 200% 100%;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.search-input:focus {
    box-shadow: 0 0 0 3px rgba(31, 41, 55, 0.08);
}

/* ================================================
   ACCORDION
   ================================================ */
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition:
        max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        opacity var(--transition-smooth);
    opacity: 0;
    will-change: max-height, opacity;
    transform: translateZ(0);
}

.accordion-content.active {
    max-height: 5000px;
    opacity: 1;
}

.accordion-icon {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    backface-visibility: hidden;
}

.accordion-icon.rotate {
    transform: rotate(180deg);
}

.category-header {
    cursor: pointer;
    user-select: none;
    border-bottom: 1px solid #f3f4f6;
    transition: background-color var(--transition-base);
}

.category-header:hover {
    background-color: #fafafa;
}

/* ================================================
   BRUTAL BUTTONS
   ================================================ */
.btn-solid {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    box-shadow: var(--shadow-brutal);
    will-change: transform, box-shadow;
    backface-visibility: hidden;
    transform: translateZ(0);
    border-radius: 3px;
}

.btn-solid:hover {
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-brutal-hover);
}

.btn-solid:active {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px 0px var(--primary-dark);
}

/* ================================================
   METHOD BADGE
   ================================================ */
.method-badge {
    border-radius: 3px;
    letter-spacing: 0.18em;
}

/* ================================================
   MODAL EXTRAS
   ================================================ */
.url-block {
    border-radius: 6px;
    transition: border-color var(--transition-base);
}
.url-block:hover {
    border-color: #d1d5db;
}

/* ================================================
   RESPONSE PRE (hidden scrollbar)
   ================================================ */
#response-data {
    -ms-overflow-style: none;
    scrollbar-width: none;
    border-radius: 6px;
}

#response-data::-webkit-scrollbar {
    display: none !important;
}

/* ================================================
   API ITEM SLIDE-IN ANIMATION
   ================================================ */
.accordion-content.active .row > div {
    animation: slideIn 0.3s ease-out forwards;
    opacity: 0;
    will-change: opacity, transform;
    backface-visibility: hidden;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translate3d(0, -8px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

/* Staggered delays */
.accordion-content.active .row > div:nth-child(1) { animation-delay: 0.04s; }
.accordion-content.active .row > div:nth-child(2) { animation-delay: 0.08s; }
.accordion-content.active .row > div:nth-child(3) { animation-delay: 0.12s; }
.accordion-content.active .row > div:nth-child(4) { animation-delay: 0.16s; }
.accordion-content.active .row > div:nth-child(5) { animation-delay: 0.20s; }
.accordion-content.active .row > div:nth-child(6) { animation-delay: 0.24s; }

/* ================================================
   MOBILE
   ================================================ */
@media (max-width: 768px) {
    body {
        background-image: radial-gradient(circle, rgba(229, 231, 235, 0.25) 1px, transparent 1px);
    }

    .accordion-content.active .row > div {
        animation-duration: 0.18s;
    }

    .mobile-menu {
        width: 290px;
    }
}

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

    .live-dot {
        animation: none;
    }
}