/* --- Base Color Variables (Values set by JS themes) --- */
:root {
    /* Fallback values (Pastel Sky - Default Theme) - JS will override with active theme */
    /* These are the -val hexcodes */
    --primary-bg-color-val: #e0f2f7;
    --card-bg-color-val: #ffffff;
    --card-bg-alpha: 0.85;
    --text-color-val: #37474f;
    --accent-text-color-val: #81d4fa;
    --particle-color-val: #ffffff;
    --particle-alpha: 0.7;
    --glow-color-val: #b3e5fc;
    --glow-alpha: 0.3;
    --card-border-color-val: #b0bec5;
    --card-border-alpha: 0.5;
    --card-shadow-color-val: #78909c;
    --card-shadow-alpha: 0.15;
    --font-family-main: 'Caveat', cursive;

    /* CSS variables that will be constructed by JS into full rgba() strings or direct hex */
    /* For elements that need simple, html2canvas-compatible values */
    --primary-bg-color: var(--primary-bg-color-val); /* Solid color */
    --text-color: var(--text-color-val);             /* Solid color */
    --accent-text-color: var(--accent-text-color-val); /* Solid color */

    --card-bg-color-rgba: rgba(255, 255, 255, 0.85); /* Fallback, JS sets */
    --particle-color-rgba: rgba(255, 255, 255, 0.7);   /* Fallback, JS sets */
    --glow-color-rgba: rgba(179, 229, 252, 0.3);    /* Fallback, JS sets */
    --card-border-color-rgba: rgba(176, 190, 197, 0.5);/* Fallback, JS sets */
    --card-shadow-color-rgba: rgba(120, 144, 156, 0.15);/* Fallback, JS sets */

    /* Panel specific fallbacks (derived from pastelSky, JS will also set these) */
    --panel-bg-color-rgba: rgba(224, 242, 247, 0.85);
    --panel-border-color-rgba: rgba(129, 212, 250, 0.3);
    --panel-toggle-hover-shadow-rgba: rgba(129, 212, 250, 0.4);
    --settings-label-color-rgba: rgba(55, 71, 79, 0.85);
    --select-bg-color-rgba: rgba(224, 242, 247, 0.5);
    --select-border-color-rgba: rgba(129, 212, 250, 0.4);
    --button-hover-bg-color: #a2e0fb;
    --reset-button-bg-color: rgba(109,130,138,1);
    --reset-button-hover-bg-color: rgba(129,148,156,1);


    --hitokoto-font-size: 1.65em;
    --from-font-size: 0.98em;
    --quote-corner-font-size: 2.2em;
    --particle-animation-duration: 10s; /* Default, JS uses setting.particleSpeed */
}

*, *::before, *::after {
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    font-family: var(--font-family-main);
    background-color: var(--primary-bg-color); /* JS sets this based on -val */
    color: var(--text-color); /* JS sets this based on -val */
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    transition: background-color 0.5s ease, color 0.5s ease, font-family 0.3s ease;
    padding-bottom: 50px; /* Space for footer */
}

/* --- Particle Effects --- */
#particle-container {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; overflow: hidden; z-index: 0;
}
.particle {
    position: absolute;
    will-change: transform, opacity;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    background-color: var(--particle-color-rgba); /* Use the JS-set RGBA value */
}
.particle.rain_down {
    bottom: 100%; border-radius: 0 0 5px 5px / 0 0 50% 50%; animation-name: fall;
}
@keyframes fall {
    0% { transform: translateY(0vh) scaleY(0.5) scaleX(0.7); opacity: 0; }
    10% { opacity: 1; transform: translateY(10vh) scaleY(1) scaleX(1); } /* Opacity here might be overridden by JS inline style if needed */
    90% { opacity: 1; }
    100% { transform: translateY(110vh) scaleY(1.2) scaleX(0.8); opacity: 0; }
}
.particle.bubbles_up {
    top: 100%; border-radius: 50%; animation-name: rise;
    box-shadow: inset 0 0 1px 0px var(--text-color); /* Use solid text color */
}
@keyframes rise {
    0% { transform: translateY(0vh) scale(0.3); opacity: 0; }
    10% { opacity: 0.9; transform: translateY(-10vh) scale(0.8); }
    50% { transform: translateY(-50vh) scale(1); }
    90% { opacity: 0.7; }
    100% { transform: translateY(-110vh) scale(1.2); opacity: 0; }
}
.particle.soft_float {
    top: 100%; animation-name: softRise; opacity: 0;
}
@keyframes softRise {
    0% { transform: translateY(0vh) translateX(0vw) scale(0.2); opacity: 0; }
    20% { opacity: 0.8; transform: translateY(-20vh) translateX(2vw) scale(0.7); }
    50% { transform: translateY(-50vh) translateX(-1vw) scale(1); }
    80% { opacity: 0.6; transform: translateY(-80vh) translateX(1vw) scale(0.8); }
    100% { transform: translateY(-110vh) translateX(-2vw) scale(0.5); opacity: 0; }
}
.particle.sketch_drift {
    bottom: 100%; animation-name: sketchFall;
}
@keyframes sketchFall {
    0% { transform: translateY(0vh) translateX(0vw) rotate(var(--initial-rotate, 0deg)) scale(0.7); opacity: 0; }
    10% { opacity: 1; transform: translateY(10vh) translateX(calc(var(--drift-x, 0) * 1vw)) rotate(calc(var(--initial-rotate, 0deg) + 10deg)) scale(1); }
    90% { opacity: 1; }
    100% { transform: translateY(110vh) translateX(calc(var(--drift-x, 0) * 5vw)) rotate(calc(var(--initial-rotate, 0deg) + 45deg)) scale(0.8); opacity: 0; }
}
.particle.croissant_fall {
    bottom: 100%; animation-name: croissantFallAnimation; user-select: none;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
    background-color: transparent !important; /* Croissant is an emoji, no bg color */
    /* Opacity for croissant is directly handled by JS inline style for consistency */
}
@keyframes croissantFallAnimation {
    0% { transform: translateY(0vh) rotate(0deg) scale(0.8); opacity: 0; } /* Start with 0 opacity */
    10% { transform: translateY(10vh) rotate(20deg) scale(1); /* Opacity set by JS */}
    50% { transform: translateY(50vh) rotate(-15deg) scale(1.1); }
    90% { /* Opacity fades via JS or remains from JS */}
    100% { transform: translateY(110vh) rotate(30deg) scale(0.9); opacity: 0; } /* End with 0 opacity */
}


/* --- Hitokoto Card --- */
.hitokoto-card-container {
    display: flex; justify-content: center; align-items: center;
    width: 100%; min-height: 100vh; padding: 20px; z-index: 1; box-sizing: border-box;
}
.hitokoto-card {
    background-color: var(--card-bg-color-rgba); /* Use JS-set RGBA */
    border: 1px solid var(--card-border-color-rgba); /* Use JS-set RGBA */
    padding: 30px 35px;
    border-radius: 20px; max-width: 800px; width: 90%;
    box-shadow: 0 15px 40px var(--card-shadow-color-rgba); /* Use JS-set RGBA */
    transform: translateY(0) scale(1);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    text-align: center; cursor: pointer;
    transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1),
                box-shadow 0.35s cubic-bezier(0.25, 0.8, 0.25, 1),
                background-color 0.5s ease, border-color 0.5s ease;
    will-change: transform, box-shadow; margin: auto; position: relative;
}
@media (hover: hover) and (pointer: fine) {
    .hitokoto-card:hover {
       transform: translateY(-8px) scale(1.015);
       box-shadow: 0 0 30px 8px var(--glow-color-rgba), 0 20px 50px var(--card-shadow-color-rgba);
    }
}
.hitokoto-card.touch-glow {
    transform: translateY(-8px) scale(1.015);
    box-shadow: 0 0 30px 8px var(--glow-color-rgba), 0 20px 50px var(--card-shadow-color-rgba);
}

/* Quote Styling */
.hitokoto-content {
    display: block;
    margin-bottom: 22px;
    position: relative; /* This is the anchor for absolute quotes */
    padding: 0.2em 0;
}

#hitokoto-text {
    font-size: var(--hitokoto-font-size);
    line-height: 1.6;
    color: var(--text-color);
    animation: fadeInText 0.8s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
    font-weight: normal;
    transition: color 0.5s ease, font-size 0.3s ease;
    display: inline-block;
    position: relative;
    padding-left: 0.8em;  /* Space for open quote */
    padding-right: 0.8em; /* Space for close quote */
    vertical-align: top;
}

.quote-corner {
    position: absolute;
    font-family: 'KaiTi', 'STKaiti', 'SimSun', 'SongTi', serif;
    font-size: var(--quote-corner-font-size);
    font-weight: bold;
    color: var(--accent-text-color);
    opacity: 0.6;
    line-height: 1;
    z-index: 0;
    transition: color 0.5s ease, opacity 0.3s ease, font-size 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    top: 50%;
    transform: translateY(-50%);
}

.quote-open {
    left: 0;
}

.quote-close {
    right: 0;
}


#hitokoto-from {
    font-size: var(--from-font-size);
    color: var(--accent-text-color);
    text-align: right;
    margin-top: 18px;
    font-style: italic;
    animation: fadeInFrom 0.8s cubic-bezier(0.390, 0.575, 0.565, 1.000) 0.2s both;
    opacity: 0.85;
    transition: color 0.5s ease, font-size 0.3s ease;
}
#hitokoto-from::before { content: "—— "; }
@keyframes fadeInText {
    0% { opacity: 0; transform: translateY(15px); }
    100% { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInFrom {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 0.85; transform: translateY(0); }
}

/* --- Settings Panel --- */
#settings-panel {
    position: fixed; top: 15px; right: 15px;
    background-color: var(--panel-bg-color-rgba);
    border: 1px solid var(--panel-border-color-rgba);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border-radius: 12px; padding: 20px; z-index: 1000;
    color: var(--text-color);
    width: 340px; box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.4s ease-out;
    opacity: 1; max-height: calc(100vh - 30px); overflow-y: auto;
}
#settings-panel.hidden {
    transform: translateX(calc(100% + 40px)); opacity: 0; pointer-events: none;
}
#panel-toggle-button {
    position: fixed; top: 20px; right: 20px; z-index: 1001;
    background-color: var(--card-bg-color-rgba);
    color: var(--accent-text-color);
    border: 1px solid var(--card-border-color-rgba);
    border-radius: 50%; width: 48px; height: 48px; font-size: 24px;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: transform 0.25s ease-out, background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
#panel-toggle-button:hover {
    transform: scale(1.12) rotate(15deg);
    background-color: var(--accent-text-color);
    color: var(--primary-bg-color);
    box-shadow: 0 6px 15px var(--panel-toggle-hover-shadow-rgba);
}
#panel-toggle-button.hidden {
    display: none;
}
#settings-panel h3 {
    margin-top: 0; margin-bottom: 20px; text-align: center;
    color: var(--accent-text-color); font-size: 1.4em; font-weight: 600;
    padding-bottom: 10px; border-bottom: 1px solid var(--panel-border-color-rgba);
}
#settings-panel h4 {
    margin-top: 20px; margin-bottom: 12px; font-size: 1.1em;
    color: var(--accent-text-color);
    border-bottom: 1px solid var(--panel-border-color-rgba);
    padding-bottom: 6px; font-weight: 500;
}
.settings-presets {
    margin-bottom: 15px;
}
.settings-presets-buttons {
    display: flex; flex-wrap: wrap; gap: 8px;
}
.settings-presets-buttons button {
    flex-grow: 1; font-size: 0.85em !important; padding: 8px 10px !important;
}

.setting-group {
    margin-bottom: 15px; display: flex; flex-wrap: wrap;
    align-items: center; gap: 8px 10px;
}
.setting-group label {
    flex-shrink: 0; font-size: 0.95em;
    color: var(--settings-label-color-rgba);
}
.setting-group label:first-of-type {
    flex-basis: 90px;
    flex-shrink: 0;
}
.setting-group.setting-group-color-alpha {
    flex-wrap: nowrap;
}
.setting-group label.alpha-label {
    flex-shrink: 0;
    margin-left: 10px;
    margin-right: 5px;
    text-align: right;
}
.setting-group.setting-group-color-alpha input[type="color"] {
    flex-shrink: 0;
}
.setting-group.setting-group-color-alpha input[type="range"] {
    flex-grow: 1;
    min-width: 80px;
}

.setting-group input[type="color"] {
    -webkit-appearance: none; -moz-appearance: none; appearance: none;
    width: 36px; height: 30px;
    background-color: transparent; border: 1px solid var(--panel-border-color-rgba);
    border-radius: 5px; cursor: pointer; padding: 0; overflow: hidden;
}
.setting-group input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.setting-group input[type="color"]::-webkit-color-swatch { border: none; border-radius: 4px; }
.setting-group input[type="color"]::-moz-color-swatch { border: none; border-radius: 4px; }

.setting-group input[type="range"] {
    cursor: pointer; accent-color: var(--accent-text-color);
}
.setting-group select {
    flex-grow: 1; padding: 8px 10px;
    background-color: var(--select-bg-color-rgba);
    color: var(--text-color);
    border: 1px solid var(--select-border-color-rgba);
    border-radius: 6px; font-size: 0.9em;
}
.setting-group select:focus {
    outline: 2px solid var(--accent-text-color);
}
#settings-panel hr.section-divider {
    border: none; border-top: 1px solid var(--panel-border-color-rgba); margin: 25px 0;
}
#settings-panel button {
    padding: 10px 15px; background-color: var(--accent-text-color);
    color: var(--primary-bg-color);
    border: none; border-radius: 8px; cursor: pointer; font-weight: 500;
    transition: background-color 0.25s ease, transform 0.15s ease, box-shadow 0.15s ease;
    font-size: 0.95em;
}
#settings-panel button:hover {
    background-color: var(--button-hover-bg-color);
    transform: translateY(-2px); box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}
#settings-panel button#resetSettings {
    display: block; width: calc(100% - 10px); margin: 20px auto 10px auto;
    background-color: var(--reset-button-bg-color);
    color: var(--accent-text-color);
}
#settings-panel button#resetSettings:hover {
    background-color: var(--reset-button-hover-bg-color);
}
#settings-panel button#togglePanel {
    display: block; width: calc(100% - 10px); margin: 10px auto 5px auto;
    background-color: #556677; color: #e0e8f0;
}
#settings-panel button#togglePanel:hover {
    background-color: #667788;
}

#settings-panel::-webkit-scrollbar { width: 8px; }
#settings-panel::-webkit-scrollbar-track {
    background: transparent; border-radius: 10px;
}
#settings-panel::-webkit-scrollbar-thumb {
    background-color: var(--settings-label-color-rgba);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
}
#settings-panel::-webkit-scrollbar-thumb:hover {
    background-color: var(--accent-text-color);
}

footer {
    position: fixed; bottom: 0; left: 0; width: 100%;
    padding: 8px 0; text-align: center; font-size: 0.85em;
    color: var(--accent-text-color);
    background-color: transparent;
    z-index: 5; pointer-events: none;
}
footer p {
    margin: 0; padding: 0; display: inline-block;
    background-color: var(--primary-bg-color);
    padding: 3px 10px; border-radius: 10px;
    pointer-events: auto;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

@media (max-width: 768px) {
    .hitokoto-card { width: 95%; padding: 25px 30px; }
    #hitokoto-text { font-size: calc(var(--hitokoto-font-size) * 0.9); }
    #hitokoto-from { font-size: calc(var(--from-font-size) * 0.9); }
    .quote-corner { font-size: calc(var(--quote-corner-font-size) * 0.9); }
}
@media (max-width: 480px) {
    :root {
        --hitokoto-font-size: 1.3em;
        --from-font-size: 0.8em;
        --quote-corner-font-size: 1.8em;
    }
    .hitokoto-card { padding: 20px 25px; }
    #hitokoto-text { padding-left: 0.6em; padding-right: 0.6em; }

    #settings-panel {
        width: calc(100vw - 20px); right: 10px; top: 10px;
        padding: 15px;
    }
    .setting-group {
        flex-direction: column; align-items: stretch; gap: 6px;
    }
    .setting-group.setting-group-color-alpha {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }
    .setting-group.setting-group-color-alpha label:first-of-type {
        flex-basis: auto !important;
        width: auto;
        margin-bottom: 0;
    }
    .setting-group.setting-group-color-alpha input[type="color"] {
        margin-right: 5px;
    }
    .setting-group.setting-group-color-alpha label.alpha-label {
        flex-basis: auto !important;
        width: auto;
        text-align: left;
        margin-left: 5px;
        margin-bottom: 0;
    }
    .setting-group.setting-group-color-alpha input[type="range"] {
        min-width: 100px;
        width: 100%;
    }
    #settings-panel h3 { font-size: 1.3em; margin-bottom: 15px; }
    #settings-panel h4 { font-size: 1.0em; margin-bottom: 10px; }
    .settings-presets-buttons button { font-size: 0.8em !important; padding: 6px 8px !important; }
    #settings-panel button { font-size: 0.9em; padding: 8px 12px;}
    footer p { font-size: 0.75em; }
}

html, body { overflow: hidden; }

#saveImageButton {
    position: fixed; bottom: 15px; right: 15px; z-index: 1001;
    background-color: var(--card-bg-color-rgba);
    color: var(--accent-text-color);
    border: 1px solid var(--card-border-color-rgba);
    border-radius: 50%; width: 48px; height: 48px; font-size: 24px;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    transition: transform 0.2s ease-out, background-color 0.3s ease, color 0.3s ease;
}
#saveImageButton:hover {
    transform: scale(1.1);
    background-color: var(--accent-text-color);
    color: var(--primary-bg-color);
}
#saveImageButton:disabled {
    cursor: not-allowed; opacity: 0.7;
    animation: pulseSave 1.5s infinite;
}
@keyframes pulseSave {
    0% { box-shadow: 0 0 0 0 var(--accent-text-color); }
    70% { box-shadow: 0 0 0 10px rgba(var(--accent-text-color-val), 0); }
    100% { box-shadow: 0 0 0 0 rgba(var(--accent-text-color-val), 0); }
}

.floating-heart {
    position: fixed;
    font-size: 24px;
    animation: heartFloat 1s ease-out forwards;
    pointer-events: none;
    user-select: none;
    z-index: 9999;
}
@keyframes heartFloat {
    0% { transform: translateY(0) scale(0.5); opacity: 1; }
    100% { transform: translateY(-80px) scale(1.5); opacity: 0; }
}