/* ========================================
   SISTEMA DE TEMAS - SEBO O ALFARRÁBIO
   Light (padrão) / Dark mode
   ======================================== */

/* ========================================
   VARIÁVEIS DO TEMA CLARO (padrão)
   Cores baseadas na paleta atual do site
   ======================================== */
:root {
    /* Backgrounds */
    --bg-primary: #faf4e6;
    --bg-secondary: #FAF8F3;
    --bg-header: linear-gradient(to bottom, #fcf6e9, #faf4e6);
    --bg-footer: rgb(189, 144, 86);
    --bg-card: #ffffff;
    --bg-card-hover: #F0E6D2;
    --bg-input: #ffffff;
    --bg-menu-sec: #fcf6e9;

    /* Texto */
    --text-primary: #805020;
    --text-secondary: #6D5638;
    --text-muted: #8b7355;
    --text-light: #f5f1e8;
    --text-on-accent: #ffffff;

    /* Acentos */
    --accent: rgb(189, 144, 86);
    --accent-hover: rgb(169, 124, 66);
    --accent-dark: rgb(149, 104, 46);
    --accent-gold: #d4a574;
    --accent-warm: #a87e4b;

    /* Bordas e sombras */
    --border-color: rgba(189, 144, 86, 0.15);
    --border-accent: rgba(189, 144, 86, 0.2);
    --shadow-light: rgba(139, 115, 85, 0.08);
    --shadow-medium: rgba(139, 115, 85, 0.15);
    --shadow-card: rgba(168, 107, 9, 0.08);

    /* Categorias */
    --cat-bg: #FAF8F3;
    --cat-icon-bg: #FAF5E6;
    --cat-icon-hover: #F0E6D2;
    --cat-card-bg: #ffffff;

    /* Seção livros */
    --books-bg: linear-gradient(135deg, #996f3b 0%, #996f3b 50%, #75542b 100%);
    --books-card-bg: linear-gradient(145deg, #f9f7f4, #ebe3d5);
    --books-card-title: #3a2a1f;

    /* Sobre nós */
    --sobre-bg: #faf4e6;
    --sobre-text: #5a3e28;

    /* Dropdown */
    --dropdown-bg: #ffffff;
    --dropdown-text: #694100;
    --dropdown-hover-bg: rgba(252, 246, 233, 0.5);

    /* Misc */
    --overlay-bg: rgba(0, 0, 0, 0.5);
    --transition-speed: 0.4s;
}

/* ========================================
   VARIÁVEIS DO TEMA ESCURO
   ======================================== */
[data-theme="dark"] {
    /* Backgrounds */
    --bg-primary: #1a1209;
    --bg-secondary: #221a10;
    --bg-header: linear-gradient(to bottom, #2a1f14, #221a10);
    --bg-footer: #2a1f14;
    --bg-card: #33261a;
    --bg-card-hover: #3d2e20;
    --bg-input: #2a1f14;
    --bg-menu-sec: #2a1f14;

    /* Texto */
    --text-primary: #f5f1e8;
    --text-secondary: #d4c5a9;
    --text-muted: #a89880;
    --text-light: #f5f1e8;
    --text-on-accent: #ffffff;

    /* Acentos */
    --accent: #d4a574;
    --accent-hover: #c89968;
    --accent-dark: #b8885a;
    --accent-gold: #e8c49a;
    --accent-warm: #d4a574;

    /* Bordas e sombras */
    --border-color: rgba(212, 165, 116, 0.15);
    --border-accent: rgba(212, 165, 116, 0.25);
    --shadow-light: rgba(0, 0, 0, 0.2);
    --shadow-medium: rgba(0, 0, 0, 0.3);
    --shadow-card: rgba(0, 0, 0, 0.35);

    /* Categorias */
    --cat-bg: #221a10;
    --cat-icon-bg: #33261a;
    --cat-icon-hover: #3d2e20;
    --cat-card-bg: #33261a;

    /* Seção livros */
    --books-bg: linear-gradient(135deg, #3a2a1f 0%, #2a1f14 50%, #1a1209 100%);
    --books-card-bg: linear-gradient(145deg, #3d2e20, #33261a);
    --books-card-title: #f5f1e8;

    /* Sobre nós */
    --sobre-bg: #221a10;
    --sobre-text: #d4c5a9;

    /* Dropdown */
    --dropdown-bg: #33261a;
    --dropdown-text: #d4c5a9;
    --dropdown-hover-bg: rgba(212, 165, 116, 0.1);

    /* Misc */
    --overlay-bg: rgba(0, 0, 0, 0.7);
}

/* ========================================
   TRANSIÇÃO GLOBAL SUAVE
   ======================================== */
html[data-theme],
html:not([data-theme]) {
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease;
}

/* ========================================
   BOTÃO DE TOGGLE DE TEMA
   Posição fixa, canto inferior direito
   ======================================== */
.theme-toggle-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--text-on-accent);
    box-shadow:
        0 4px 15px rgba(0, 0, 0, 0.2),
        0 0 30px rgba(189, 144, 86, 0.15);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    overflow: hidden;
}

.theme-toggle-btn:hover {
    transform: scale(1.15) rotate(15deg);
    box-shadow:
        0 6px 25px rgba(0, 0, 0, 0.3),
        0 0 40px rgba(189, 144, 86, 0.25);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

/* Ícone dentro do botão */
.theme-toggle-btn .toggle-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    line-height: 1;
}

.theme-toggle-btn.animating .toggle-icon {
    transform: rotate(360deg) scale(0);
}

/* Tooltip */
.theme-toggle-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    right: 0;
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 13px;
    font-family: 'Merriweather', serif;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--shadow-medium);
    pointer-events: none;
}

.theme-toggle-btn:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ========================================
   PULSE GLOW PARA PRIMEIRA VEZ
   ======================================== */
@keyframes theme-pulse {

    0%,
    100% {
        box-shadow:
            0 4px 15px rgba(0, 0, 0, 0.2),
            0 0 30px rgba(189, 144, 86, 0.15);
    }

    50% {
        box-shadow:
            0 4px 15px rgba(0, 0, 0, 0.2),
            0 0 50px rgba(189, 144, 86, 0.4);
    }
}

.theme-toggle-btn.pulse {
    animation: theme-pulse 2s ease-in-out 3;
}

/* ========================================
   RESPONSIVO
   ======================================== */
@media (max-width: 768px) {
    .theme-toggle-btn {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
}