/* =====================================================
   LOGIN PAGE - Metallic Theme
   ===================================================== */

:root {
    --metal-black:      #0a0c10;
    --metal-dark:       #111318;
    --metal-mid:        #1a1e26;
    --metal-surface:    #1e2330;
    --metal-card:       #222836;
    --metal-border:     #2a3347;
    --metal-blue-dark:  #0d2040;
    --metal-blue:       #1a4a8a;
    --metal-blue-mid:   #1e5aaa;
    --metal-blue-light: #2a7bd4;
    --metal-blue-glow:  #3a9bff;
    --metal-accent:     #4db8ff;
    --metal-grey:       #8a9ab8;
    --metal-grey-light: #b0bdd4;
    --metal-white:      #d8e4f0;
    --metal-text:       #c8d8ec;
    --metal-text-dim:   #7a8fa8;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    min-height: 100vh;
}

body {
    font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
    background-color: var(--metal-black);
    background-image:
        radial-gradient(ellipse at 15% 50%, rgba(26, 74, 138, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse at 85% 20%, rgba(42, 123, 212, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 90%, rgba(13, 32, 64, 0.3) 0%, transparent 60%),
        linear-gradient(180deg, var(--metal-black) 0%, #0c0e14 100%);
    background-attachment: fixed;
    color: var(--metal-text);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem 1rem;
}

/* Partículas de fundo */
#js-particles,
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particles-js-canvas-el {
    position: fixed;
}

/* Container principal do login */
.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
}

/* Card de login */
.login-card {
    background: linear-gradient(145deg,
        rgba(34, 40, 54, 0.95) 0%,
        rgba(26, 30, 38, 0.98) 100%);
    border: 1px solid var(--metal-border);
    border-radius: 12px;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.7),
        0 0 0 1px rgba(42, 123, 212, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    padding: 2.5rem 2rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--metal-blue) 20%,
        var(--metal-blue-glow) 50%,
        var(--metal-blue) 80%,
        transparent 100%);
}

/* Logo */
.login-logo {
    display: block;
    max-width: 75%;
    margin: 0 auto 1.5rem;
    filter: drop-shadow(0 0 15px rgba(77, 184, 255, 0.3));
}

/* Título */
.login-title {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--metal-accent);
    text-shadow: 0 0 15px rgba(77, 184, 255, 0.4);
    margin-bottom: 1.5rem;
}

/* Formulário */
.form-group {
    margin-bottom: 1rem;
}

.form-control {
    background-color: rgba(26, 30, 38, 0.8) !important;
    border: 1px solid var(--metal-border) !important;
    color: var(--metal-text) !important;
    border-radius: 6px;
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
    transition: all 0.25s ease;
    width: 100%;
}

.form-control:focus {
    background-color: rgba(30, 35, 48, 0.95) !important;
    border-color: var(--metal-blue-light) !important;
    box-shadow: 0 0 0 3px rgba(42, 123, 212, 0.2), 0 0 15px rgba(42, 123, 212, 0.1) !important;
    color: var(--metal-white) !important;
    outline: none;
}

.form-control::placeholder {
    color: var(--metal-text-dim) !important;
    opacity: 0.8;
}

.form-control-lg {
    padding: 0.75rem 1rem;
    font-size: 1rem;
}

/* Botão de login */
.btn-login {
    background: linear-gradient(135deg, var(--metal-blue-mid) 0%, var(--metal-blue-dark) 100%);
    border: 1px solid var(--metal-blue-light);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 0.75rem;
    border-radius: 6px;
    width: 100%;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 15px rgba(26, 74, 138, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
    transition: left 0.4s ease;
}

.btn-login:hover::before {
    left: 100%;
}

.btn-login:hover {
    background: linear-gradient(135deg, var(--metal-blue-light) 0%, var(--metal-blue-mid) 100%);
    border-color: var(--metal-blue-glow);
    box-shadow: 0 6px 25px rgba(42, 123, 212, 0.6);
    transform: translateY(-1px);
    color: #fff;
}

.btn-login:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(42, 123, 212, 0.4);
}

/* Botões de download */
.btn-download {
    background: linear-gradient(135deg, var(--metal-blue) 0%, var(--metal-blue-dark) 100%);
    border: 1px solid var(--metal-blue-light);
    color: var(--metal-white);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    width: 100%;
    text-align: center;
    display: block;
    transition: all 0.2s ease;
    text-decoration: none;
    margin-bottom: 0.5rem;
}

.btn-download:hover {
    background: linear-gradient(135deg, var(--metal-blue-light) 0%, var(--metal-blue) 100%);
    box-shadow: 0 4px 15px rgba(42, 123, 212, 0.5);
    color: #fff;
    transform: translateY(-1px);
    text-decoration: none;
}

.btn-copy {
    background: linear-gradient(135deg, #0e6b8a 0%, #084d6b 100%);
    border: 1px solid #1a9bc4;
    color: #b8eeff;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    width: 100%;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 0.5rem;
}

.btn-copy:hover {
    background: linear-gradient(135deg, #1a9bc4 0%, #0e6b8a 100%);
    box-shadow: 0 4px 15px rgba(26, 155, 196, 0.5);
    color: #fff;
    transform: translateY(-1px);
}

/* Seção de informações */
.info-section {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--metal-border);
}

.info-title {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--metal-text-dim);
    text-align: center;
    margin-bottom: 0.75rem;
}

/* Mensagem de erro - Acesso inválido */
.alert-invalid {
    background: linear-gradient(135deg, rgba(139, 26, 26, 0.4) 0%, rgba(90, 15, 15, 0.4) 100%);
    border: 1px solid #c0392b;
    border-left: 4px solid #e74c3c;
    color: #ffaaaa;
    padding: 0.65rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
    text-align: center;
    box-shadow: 0 0 15px rgba(192, 57, 43, 0.2);
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* Footer link */
.footer-link {
    display: block;
    text-align: center;
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--metal-text-dim);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--metal-accent);
    text-decoration: none;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--metal-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--metal-blue);
    border-radius: 3px;
}