/* ============================================================
   login.css — Página de Login
   ============================================================ */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--clr-void);
    position: relative;
    overflow: hidden;
}

/* Fundo atmosférico */
.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(74,0,128,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.login-page::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(139,0,0,0.1) 0%, transparent 70%);
    pointer-events: none;
}

/* Canvas partículas */
#login-particles {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* === Card de Login === */
.login-card {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 420px;
    padding: 2rem;
    animation: fadeIn 0.8s ease both;
}

/* Borda decorativa */
.login-card-inner {
    background: rgba(8,0,18,0.95);
    border: 1px solid rgba(139,0,0,0.3);
    padding: 3rem 2.5rem;
    position: relative;
    backdrop-filter: blur(10px);
}

.login-card-inner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--clr-blood), var(--clr-purple), transparent);
}

.login-card-inner::after {
    content: '';
    position: absolute;
    inset: -1px;
    border: 1px solid transparent;
    background: linear-gradient(135deg, rgba(139,0,0,0.1), transparent, rgba(74,0,128,0.1)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    pointer-events: none;
}

/* Canto decorativo */
.login-corner {
    position: absolute;
    width: 20px; height: 20px;
    border-color: var(--clr-blood);
    border-style: solid;
    opacity: 0.5;
}
.login-corner--tl { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.login-corner--tr { top: -1px; right: -1px; border-width: 2px 2px 0 0; }
.login-corner--bl { bottom: -1px; left: -1px; border-width: 0 0 2px 2px; }
.login-corner--br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

/* --- Logo / Título --- */
.login-logo {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-sigil {
    font-family: var(--font-title);
    font-size: 2rem;
    color: var(--clr-crimson);
    text-shadow: var(--shadow-crimson);
    display: block;
    margin-bottom: 0.5rem;
    animation: sigilPulse 3s ease-in-out infinite;
}

.login-title {
    font-family: var(--font-title);
    font-size: 1.4rem;
    color: var(--clr-pale);
    letter-spacing: 0.1em;
    text-shadow: var(--shadow-text);
}

.login-subtitle {
    font-family: var(--font-accent);
    font-style: italic;
    font-size: 0.85rem;
    color: var(--clr-ash);
    opacity: 0.6;
    margin-top: 0.25rem;
}

/* --- Form === */
.login-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

.form-label {
    font-family: var(--font-heading);
    font-size: 0.65rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--clr-lilac);
    opacity: 0.8;
}

.form-input {
    background: rgba(4,0,10,0.8);
    border: 1px solid rgba(139,0,0,0.3);
    color: var(--clr-pale);
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: all var(--trans-fast);
    width: 100%;
}

.form-input::placeholder { color: var(--clr-ash); opacity: 0.3; }

.form-input:focus {
    border-color: var(--clr-crimson);
    box-shadow: 0 0 0 1px rgba(204,0,32,0.2), 0 0 15px rgba(204,0,32,0.1);
    background: rgba(13,0,32,0.9);
}

.form-input:focus + .form-focus-line { width: 100%; }

.form-input-wrap {
    position: relative;
}

.form-focus-line {
    position: absolute;
    bottom: 0; left: 0;
    height: 1px;
    width: 0;
    background: var(--clr-crimson);
    box-shadow: 0 0 8px var(--clr-crimson);
    transition: width var(--trans-med);
}

/* --- Botão submit --- */
.login-btn {
    width: 100%;
    padding: 1rem;
    margin-top: 0.5rem;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    background: var(--grad-blood);
    border: 1px solid rgba(139,0,0,0.5);
    color: var(--clr-pale);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--trans-med);
    box-shadow: var(--shadow-crimson);
}

.login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: translateX(-100%) skewX(-15deg);
    transition: transform var(--trans-med);
}

.login-btn:hover::before { transform: translateX(200%) skewX(-15deg); }
.login-btn:hover {
    box-shadow: var(--shadow-crimson), var(--shadow-purple);
}

.login-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Back link --- */
.login-back {
    display: block;
    text-align: center;
    margin-top: 1.5rem;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--clr-ash);
    opacity: 0.5;
    transition: opacity var(--trans-fast);
}
.login-back:hover { opacity: 1; color: var(--clr-lilac); }

/* === Error state === */
.form-input.error { border-color: var(--clr-crimson); }
.form-error-msg {
    font-size: 0.75rem;
    color: #ff8888;
    margin-top: 0.25rem;
}