/* Variables CSS dinámicas basadas en el tema de Telegram */
:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #000000);
    --hint-color: var(--tg-theme-hint-color, #999999);
    --button-color: var(--tg-theme-button-color, #2481cc);
    --button-text-color: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #f0f0f0);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden; /* Evitar scroll en móvil */
    height: 100vh;
    width: 100vw;
}

.screen {
    display: none;
    height: 100%;
    width: 100%;
    flex-direction: column;
}

.screen.active {
    display: flex;
}

/* ---- Pantalla de Carga ---- */
.upload-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
    position: relative;
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    color: var(--button-color);
}

.upload-container h2 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.upload-container p {
    color: var(--hint-color);
    font-size: 16px;
}

#image-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* ---- Pantalla del Editor ---- */
.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background-color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    touch-action: none; /* Crucial para detectar el toque sin hacer zoom/scroll del navegador */
    transform-origin: center center;
    transition: transform 0.05s linear; /* Smoothness en el zoom por rueda del ratón/gestos */
}

/* Lupa flotante para el dedo */
.loupe {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    pointer-events: none; /* Para que el toque pase a través de ella al canvas */
    transform: translate(-50%, -120%); /* Desplazada hacia arriba para no taparla con el dedo */
    z-index: 100;
    overflow: hidden;
    background-color: transparent;
    transition: opacity 0.1s;
}

.loupe.hidden {
    opacity: 0;
}

.loupe-color {
    width: 100%;
    height: 100%;
    background-color: #fff;
}

.loupe-crosshair {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 10px;
    transform: translate(-50%, -50%);
    border: 1.5px solid rgba(255,255,255,0.8);
    border-radius: 50%;
    box-shadow: 0 0 2px rgba(0,0,0,0.5);
}

/* Controles de Canvas Flotantes */
.canvas-controls {
    position: absolute;
    bottom: 30px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 150;
}

.control-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--secondary-bg);
    border: none;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    cursor: pointer;
    transition: all 0.15s ease-in-out;
}

.control-btn svg {
    width: 20px;
    height: 20px;
}

.control-btn.active {
    background-color: var(--button-color);
    color: var(--button-text-color);
}

.control-btn:active {
    transform: scale(0.9);
}

/* Panel Inferior (Bottom Sheet) */
.bottom-panel {
    background-color: var(--bg-color);
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    padding: 24px 20px;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 10;
    margin-top: -15px; /* Solapa ligeramente el canvas */
}

.selected-color-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.color-box {
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.1s;
    cursor: pointer;
}

.color-box:active {
    transform: scale(0.95);
}

.main-box {
    width: 60px;
    height: 60px;
    background-color: #000;
}

.color-info {
    display: flex;
    flex-direction: column;
}

.color-label {
    font-size: 13px;
    color: var(--hint-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

#current-hex {
    font-size: 24px;
    font-weight: 700;
    cursor: pointer;
}

.palette-container {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    justify-content: space-between;
}

.palette-swatch-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.palette-swatch {
    width: 100%;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 5px;
    color: white;
    font-size: 11px;
    font-weight: 600;
    text-shadow: 0 1px 3px rgba(0,0,0,0.6);
    cursor: pointer;
    transition: transform 0.1s;
}

.palette-swatch:active {
    transform: scale(0.95);
}

.btn-secondary {
    background-color: var(--secondary-bg);
    color: var(--text-color);
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    margin-top: 10px;
    cursor: pointer;
}

.btn-secondary:active {
    opacity: 0.8;
}