/* -----------------------------
   Fontes
----------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

/* -----------------------------
   Variáveis de cores
----------------------------- */
:root {
    /* Dark Mode */
    --bg-color: #051923;
    --box-bg: rgba(0, 53, 84, 0.5);
    --text-color: #fff;
    --text-color-q: #6e6464;
    --primary: #00fff7;
    --shadow: #00fff7;
    --secondary: #00a6fb;
    --button-bg: #006494;
    --button-hover: #03045e;
    --button-color: #fff;
}

body.light-mode {
    /* Light Mode */
    --bg-color: #a12760;
    --box-bg: rgba(218, 98, 125, 0.5);
    --text-color: #ff0054;
    --text-color-q: #1d1c1c;
    --primary: #450920;
    --shadow: #ffb3c1;
    --secondary: #ffb3c1;
    --button-bg: #ffb3c1;
    --button-hover: #ff0054;
    --button-color: #450920;
}

/* -----------------------------
   Reset e body
----------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}

body, html {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-color);
    color: var(--text-color);
}

/* -----------------------------
   Canvas (fundo de partículas)
----------------------------- */
canvas {
    position: fixed;  
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;       
}

/* -----------------------------
   Container do formulário
----------------------------- */
.container {
    position: relative;
    z-index: 1;      
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

q {
    color: var(--text-color-q);
    font-size: 0.8rem;
}

/* -----------------------------
   Caixa de Login
----------------------------- */
.login-box {
    background: var(--box-bg);
    padding: 50px;
    border-radius: 20px;
    width: 380px;
    text-align: center;
    box-shadow: 0 0 20px var(--shadow), 0 0 40px var(--shadow), 0 0 60px var(--shadow);
    animation: fadeIn 1s forwards;
}

@keyframes fadeIn {
    from {opacity: 0; transform: translateY(-50px);}
    to {opacity: 1; transform: translateY(0);}
}

.login-box h2 {
    margin-bottom: 30px;
    font-size: 32px;
    color: var(--primary);
    text-shadow: 0 0 8px var(--primary)98;
}

/* -----------------------------
   Inputs
----------------------------- */
.input-group {
    position: relative;
    margin-bottom: 35px;
}

.input-group input {
    width: 100%;
    padding: 12px 0;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--primary);
    color: var(--text-color);
    font-size: 16px;
    outline: none;
    transition: 0.3s;
}

.input-group input:focus {
    border-bottom-color: var(--secondary);
    box-shadow: 0 0 10px var(--secondary);
}

.input-group label {
    position: absolute;
    top: 12px;
    left: 0;
    color: var(--primary);
    font-size: 16px;
    pointer-events: none;
    transition: 0.3s;
}

.input-group input:focus ~ label,
.input-group input:valid ~ label {
    top: -20px;
    font-size: 14px;
    color: var(--secondary);
    text-shadow: 0 0 5px var(--secondary);
}

/* -----------------------------
   Botões
----------------------------- */
button,
#themeToggle {
    width: 100%;
    padding: 15px;
    background: var(--button-bg);
    border: none;
    border-radius: 30px;
    color: var(--text-color);
    border: var(--primary) solid 1.5px;
    font-size: 18px;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 0 10px var(--button-bg), 0 0 20px var(--button-bg);
}

#themeToggle {
    width: 30%;
    padding: 10px;
    background: var(--button-bg);
    border: none;
    border-radius: 30px;
    color: var(--text-color);
    border: var(--primary) solid 1.5px;
    font-size: 18px;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 0 10px var(--button-bg), 0 0 20px var(--button-bg);
}

button:hover,
#themeToggle:hover {
    background: var(--button-hover);
    box-shadow: 0 0 20px var(--button-hover), 0 0 40px var(--button-hover);
    transform: scale(1.05);
}

i {
    font-size: 1.5rem;
    color: var(--button-color);
}

/* -----------------------------
   Mensagem de login
----------------------------- */
.message {
    margin-top: 15px;
    font-size: 14px;
    min-height: 20px;
}

/* -----------------------------
   Toggle Dark/Light
----------------------------- */
.theme-toggle {
    margin-top: 20px;
    padding: 8px 12px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    background: var(--button-bg);
    color: var(--text-color);
    transition: 0.3s;
}

.theme-toggle:hover {
    background: var(--button-hover);
}