/* ============================================================
   main.css — Core Styles for Zest & Zyme
   Contains: scrollbar, base layout, header states, animations,
             title letter-spacing, food decorations
   ============================================================ */

/* ── Scrollbar: Hide on all browsers ── */
::-webkit-scrollbar {
    width: 0px;
    background: transparent;
}

html {
    scrollbar-width: none;           /* Firefox */
    -ms-overflow-style: none;        /* IE/Edge */
    transition: background-color 0.5s ease;
}

/* ── Body: Dot-grid background pattern ── */
body {
    background-image: radial-gradient(rgba(124, 148, 115, 0.15) 1px, transparent 1px);
    background-size: 24px 24px;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    transition: background-color 0.6s ease, color 0.6s ease;
}

/* ── Header: Smooth transition on state change ── */
#header-section {
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Header Initial State: full-viewport centered hero ── */
.state-initial {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 1rem;
}

/* ── Header Active State: sticky top bar with blur ── */
.state-active {
    min-height: auto;
    position: sticky;
    top: 0;
    z-index: 50;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* ── Water Fill Animation: used on theme toggle button ── */
.water-fill-active {
    transform: translateY(0%) !important;
}

/* ── Fade In Up: entrance animation for cards and content ── */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Loader Spinner: shown during API fetch ── */
.loader {
    border: 3px solid transparent;
    border-top: 3px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: none;
}

@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ── Input Focus: Remove default browser outline ── */
input:focus {
    outline: none;
}


/* ============================================================
   BRAND TITLE — Letter Spacing
   Desktop: wide spaced for visual impact
   Mobile:  tighter, handled in mobile.css
   ============================================================ */

.brand-title {
    letter-spacing: 0.18em;   /* desktop: nice wide spacing */
}


/* ============================================================
   FOOD STICKER DECORATIONS (Desktop Only)
   Floating food emoji scattered around the hero area.
   Hidden on mobile via mobile.css.
   Hidden once header transitions to .state-active.
   ============================================================ */

/* Container that holds all sticker elements */
.hero-stickers {
    position: absolute;
    inset: 0;
    pointer-events: none;  /* clicks pass through to inputs */
    overflow: hidden;
    z-index: 0;
    transition: opacity 0.4s ease;
}

/* Hide stickers when header collapses into sticky bar */
.state-active .hero-stickers {
    opacity: 0;
    pointer-events: none;
}

/* Individual sticker base style */
.sticker {
    position: absolute;
    font-size: 2.2rem;
    line-height: 1;
    user-select: none;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.12));
    animation: floatBob var(--float-dur, 4s) ease-in-out infinite;
    animation-delay: var(--float-delay, 0s);
    transition: transform 0.3s ease;
}

/* Gentle bobbing float animation */
@keyframes floatBob {
    0%, 100% { transform: translateY(0px) rotate(var(--rot, 0deg)); }
    50%       { transform: translateY(-10px) rotate(var(--rot, 0deg)); }
}

/* Subtle rotate-wobble variant */
@keyframes floatWobble {
    0%, 100% { transform: translateY(0px) rotate(var(--rot, 0deg)); }
    33%       { transform: translateY(-8px) rotate(calc(var(--rot, 0deg) + 5deg)); }
    66%       { transform: translateY(-4px) rotate(calc(var(--rot, 0deg) - 4deg)); }
}

.sticker.wobble {
    animation-name: floatWobble;
}

.sticker.large  { font-size: 3rem; }
.sticker.small  { font-size: 1.6rem; }
.sticker.medium { font-size: 2.4rem; }