/* FONTES E VARIÁVEIS DE TEMA (LIGHT & DARK) */
:root {
    --primary-color: #367BFF;
    --primary-hover: #2968dd;
    --background-color: #f4f7f9;
    --card-background: #ffffff;
    --text-color: #333;
    --subtle-text-color: #666;
    --border-color: #dde2e7;
    --shadow-color: rgba(0, 30, 80, 0.08);
}

html.dark-theme {
    --primary-color: #4a90e2; 
    --primary-hover: #3a7bc8;
    --background-color: #181a1b;
    --card-background: #25282a;
    --text-color: #e8e6e3;
    --subtle-text-color: #a0a7b0;
    --border-color: #3a3e42;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

/* ESTILOS BASE */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    min-height: 100vh;
    box-sizing: border-box;
    line-height: 1.6;
}

.container { width: 100%; max-width: 1100px; }

/* CABEÇALHO E INFOBOX */
.title-container { display: flex; justify-content: center; align-items: center; gap: 15px; margin-bottom: 20px; }
.avatar-image { width: 90px; height: 90px; border-radius: 50%; border: 2px solid var(--border-color); object-fit: cover; transition: filter 0.3s; }
html.dark-theme .avatar-image { filter: brightness(0.9); }
.title-image { max-height: 100px; width: auto; }
.info-box { background-color: rgba(54, 123, 255, 0.05); border-left: 4px solid var(--primary-color); padding: 15px 20px; margin: 25px 0; border-radius: 8px; font-size: 0.9em; line-height: 1.6; }
.info-box p { margin: 0; color: var(--subtle-text-color); }
.info-box strong { color: var(--text-color); font-weight: 500; }
html.dark-theme .info-box { background-color: rgba(74, 144, 226, 0.1); }

/* LAYOUT PRINCIPAL */
.main-content { display: flex; flex-direction: column; gap: 25px; }
.top-row { display: flex; gap: 25px; align-items: stretch; }
.bottom-row { width: 100%; }
.column { display: flex; flex-direction: column; }
.controls-column { flex: 1; min-width: 300px; }
.preview-column { flex: 1.5; }

/* GRUPOS DE CONTROLE (CARDS) */
.control-group { background-color: var(--card-background); padding: 25px; border-radius: 16px; border: 1px solid var(--border-color); box-shadow: 0 8px 24px var(--shadow-color); }
.control-group.full-height { display: flex; flex-direction: column; justify-content: space-between; height: 100%; }
.legend { font-weight: 700; font-size: 1.1em; margin-bottom: 15px; display: block; width: 100%; color: var(--text-color); }
.options-group { margin-top: 20px; }


/* COMPONENTES DE INPUT */
textarea {
    width: 100%;
    box-sizing: border-box;
    font-size: 1em;
    font-family: 'Inter', sans-serif;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    background-color: #fafbfc;
    transition: border-color 0.2s, box-shadow 0.2s;
    resize: vertical;
}

#hex-color-input {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 100%;
    height: 45px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
}

#hex-color-input::-webkit-color-swatch { border-radius: 6px; border: none; }
#hex-color-input::-moz-color-swatch { border-radius: 6px; border: none; }

html.dark-theme textarea, html.dark-theme #hex-color-input {
    background-color: #2c2f31;
    color: var(--text-color);
    border-color: var(--border-color);
}

html.dark-theme textarea:focus, html.dark-theme #hex-color-input:focus {
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.3);
}

.custom-input { display: flex; align-items: center; cursor: pointer; font-size: 0.9em; padding: 5px 0; }
.custom-input input { display: none; }
.custom-input .checkmark { display: inline-block; width: 18px; height: 18px; border: 2px solid var(--border-color); background-color: #fff; margin-right: 10px; transition: all 0.2s; }
.custom-input input:checked + .checkmark { background-color: var(--primary-color); border-color: var(--primary-color); }
.custom-input .checkmark.checkbox { border-radius: 4px; }
.custom-input input:checked + .checkmark::after { content: ''; display: block; }
.custom-input input:checked + .checkmark.checkbox::after { width: 5px; height: 9px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); margin-left: 5px; margin-top: 2px; }
html.dark-theme .custom-input .checkmark { background-color: #3a3e42; }

/* ESTILOS DO HISTÓRICO */
.history-container { display: flex; align-items: center; gap: 10px; margin-top: 15px; }
.history-label { font-size: 0.9em; color: var(--subtle-text-color); flex-shrink: 0; }
#history-select { flex-grow: 1; padding: 8px 12px; font-size: 0.9em; font-family: 'Inter', sans-serif; color: var(--text-color); background-color: var(--background-color); border: 1px solid var(--border-color); border-radius: 8px; cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 40%; }
#history-select:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(54, 123, 255, 0.2); }
html.dark-theme #history-select { background-color: #2c2f31; }

/* PALETA DE CORES */
.colors-grid { display: flex; flex-direction: row; flex-wrap: wrap; gap: 5px; }
.color-group-title { font-size: 0.8em; font-weight: 700; color: var(--subtle-text-color); text-transform: uppercase; margin: 15px 0 5px 0; padding-bottom: 5px; border-bottom: 1px solid var(--border-color); width: 100%; }
.color-group-title:first-of-type { margin-top: 0; }
.color-option { padding: 8px 10px; border-radius: 6px; transition: background-color 0.2s; }
.color-option:hover { background-color: var(--background-color); }
.color-option input:checked + .color-swatch + .color-name { font-weight: 700; color: var(--text-color); }
.color-swatch { width: 18px; height: 18px; border-radius: 4px; margin-right: 12px; border: 1px solid var(--border-color); }
.color-name { color: var(--subtle-text-color); transition: color 0.2s, font-weight 0.2s; }

/* PREVIEW E BOTÃO SALVAR */
.preview-wrapper { display: flex; flex-direction: column; }
#preview-box { display: flex; justify-content: center; align-items: center; flex-grow: 1; min-height: 50px; background-color: var(--background-color); border-radius: 8px; padding: 20px; border: 2px dashed var(--border-color); margin-bottom: 20px; }
#preview-image { max-width: 100%; max-height: 100%; }
html.dark-theme #preview-box { background-color: #1c1e1f; }
#save-button { width: 100%; padding: 14px; font-size: 1.1em; font-weight: 500; cursor: pointer; background-color: var(--primary-color); color: white; border: none; border-radius: 8px; transition: background-color 0.2s, transform 0.1s; display: flex; justify-content: center; align-items: center; }
#save-button:hover:not(:disabled) { background-color: var(--primary-hover); }
#save-button:active:not(:disabled) { transform: scale(0.98); }
#save-button:disabled { background-color: #a0aec0; cursor: not-allowed; }
html.dark-theme #save-button:disabled { background-color: #4a5568; color: #a0aec0; }

#save-button.saving { cursor: wait; background-color: var(--primary-hover); }
#save-button.saving::before {
    content: '';
    display: inline-block;
    width: 18px;
    height: 18px;
    margin-right: 12px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* RODAPÉ E BOTÃO DE TEMA */
.site-footer { width: 100%; text-align: center; margin-top: 40px; padding-bottom: 20px; font-size: 0.85em; color: var(--subtle-text-color); }
.site-footer a { color: var(--primary-color); text-decoration: none; font-weight: 500; transition: color 0.2s ease; }
.site-footer a:hover { color: var(--primary-hover); text-decoration: underline; }
.site-footer .separator { margin: 0 8px; }
#theme-toggle { position: fixed; bottom: 20px; right: 20px; width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--border-color); background-color: var(--card-background); color: var(--text-color); cursor: pointer; display: flex; justify-content: center; align-items: center; z-index: 10000; transition: all 0.3s ease; padding: 0; overflow: hidden; }
#theme-toggle:hover { transform: scale(1.1); }
#theme-toggle .icon { position: absolute; transition: transform 0.3s ease, opacity 0.3s ease; }
#theme-toggle .icon-moon { transform: translateY(100%); opacity: 0; }
html.dark-theme #theme-toggle .icon-sun { transform: translateY(-100%); opacity: 0; }
html.dark-theme #theme-toggle .icon-moon { transform: translateY(0); opacity: 1; }

/* EFEITO DE NEVE */
#snow-container { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; overflow: hidden; z-index: 9999; pointer-events: none; }
.snowflake { position: absolute; color: white; border-radius: 50%; opacity: 0.8; animation: fall linear infinite; }
@keyframes fall { 0% { transform: translateY(-10vh) translateX(0); } 50% { transform: translateY(50vh) translateX(5vw); } 100% { transform: translateY(110vh) translateX(-5vw); } }

/* RESPONSIVIDADE */
@media (max-width: 900px) {
    .top-row { flex-direction: column; gap: 25px; }
    .preview-column { position: static; width: 100%; }
    .container { padding: 15px; }
    body { padding: 20px 10px; }
}