:root {
    --bg-deep: #0b0714;
    --purple-main: #8b5cf6;
    --purple-light: #a855f7;
    --purple-neon: #d8b4fe;
    --purple-deep: #6d28d9;
    --white-pure: #ffffff;
    --text-muted: #9ca3af;
    --text-soft: #d1d5db;
    --border-line: rgba(255, 255, 255, 0.1);
    --danger: #f87171;
    --success: #34d399;
    --card-bg: rgba(22, 16, 38, 0.85);
}

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

body {
    font-family: 'Plus Jakarta Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-deep);
    color: var(--white-pure);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    position: relative;
    overflow-x: hidden;
}

::selection { background: var(--purple-main); color: #fff; }

/* ============ AMBIENT BACKGROUND ============ */
.bg-glow {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(480px circle at 18% 20%, rgba(139, 92, 246, 0.16), transparent 60%),
        radial-gradient(520px circle at 85% 80%, rgba(168, 85, 247, 0.12), transparent 60%),
        radial-gradient(600px circle at 50% 50%, rgba(139, 92, 246, 0.08), transparent 70%);
    animation: glow-shift 14s ease-in-out infinite alternate;
    will-change: opacity; /* Otimização GPU */
}
@keyframes glow-shift {
    0% { opacity: 0.85; }
    100% { opacity: 1; }
}

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.35;
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: radial-gradient(circle at 50% 40%, black 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(circle at 50% 40%, black 0%, transparent 75%);
}

@media (prefers-reduced-motion: reduce) {
    .bg-glow { animation: none; }
}

/* ============ LAYOUT DE DUAS COLUNAS ============ */
.page-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
    max-width: 1180px;
    width: 100%;
    margin: 0 auto;
}

/* ============ COLUNA DE APRESENTAÇÃO ============ */
.showcase-panel {
    padding: 20px 8px;
}

.showcase-logo {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--purple-main);
    margin-bottom: 28px;
}
.showcase-logo em { font-style: normal; color: #fff; }

.showcase-title {
    font-size: clamp(1.9rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1.18;
    letter-spacing: -0.02em;
    margin: 0 0 16px;
}
.showcase-title span { color: var(--purple-neon); }

.showcase-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 44ch;
    line-height: 1.6;
    margin: 0 0 34px;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin: 0 0 36px;
}
.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}
.feature-icon {
    width: 40px; height: 40px;
    flex-shrink: 0;
    border-radius: 11px;
    background: rgba(139, 92, 246, 0.14);
    border: 1px solid rgba(139, 92, 246, 0.25);
    color: var(--purple-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}
.feature-list h3 {
    font-size: 0.92rem;
    font-weight: 700;
    margin: 0 0 2px;
}
.feature-list p {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
}

/* Mockup decorativo do painel do app */
.preview-mockup {
    background: rgba(10, 5, 24, 0.6);
    border: 1px solid var(--border-line);
    border-radius: 16px;
    padding: 14px 18px 22px;
    max-width: 380px;
    box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}
.preview-dot {
    display: inline-block;
    width: 9px; height: 9px;
    border-radius: 50%;
    margin-right: 5px;
}
.preview-dot.red { background: #ff5f56; }
.preview-dot.yellow { background: #ffbd2e; }
.preview-dot.green { background: #27c93f; }

.preview-body {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-top: 16px;
}

.preview-ring {
    width: 84px; height: 84px;
    border-radius: 50%;
    flex-shrink: 0;
    background: conic-gradient(var(--purple-main) 0% 45%, var(--purple-light) 45% 70%, rgba(255,255,255,0.12) 70% 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.preview-ring::before {
    content: '';
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    background: #0e0a1c;
}
.preview-ring span {
    position: relative;
    font-size: 0.68rem;
    font-weight: 700;
    color: #fff;
}

.preview-chat { flex: 1; }
.preview-bubble {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(139, 92, 246, 0.12);
    border: 1px solid rgba(168, 85, 247, 0.25);
    padding: 9px 12px;
    border-radius: 12px;
    font-size: 0.74rem;
    color: var(--text-soft);
}
.preview-bubble i { color: var(--purple-neon); font-size: 0.8rem; }

@media (max-width: 980px) {
    .page-shell { grid-template-columns: 1fr; gap: 30px; max-width: 460px; }
    .showcase-panel { padding: 0; text-align: left; }
    .preview-mockup { max-width: none; }
}
@media (max-width: 620px) {
    .feature-list { display: none; }
    .preview-mockup { display: none; }
}

/* ============ CARD ============ */
.login-clean-container {
    background: var(--card-bg);
    backdrop-filter: blur(12px); /* Reduzido de 20px para melhorar performance */
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-line);
    border-radius: 22px;
    width: 100%;
    max-width: 424px;
    margin: 0 auto;
    padding: 38px 34px 30px;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.55),
        0 0 0 1px rgba(139, 92, 246, 0.06),
        0 0 40px rgba(139, 92, 246, 0.08);
    position: relative;
    z-index: 1;
    animation: card-in 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

@keyframes card-in {
    from { opacity: 0; transform: translateY(14px) scale(0.985); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-clean-container::before {
    content: '';
    position: absolute;
    top: 0; left: 14%; right: 14%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--purple-neon), transparent);
    opacity: 0.6;
}

.security-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--purple-neon);
    background: rgba(139, 92, 246, 0.1);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    margin: 0 auto 22px auto;
    width: fit-content;
}
.security-badge i { font-size: 0.7rem; }

.login-header {
    text-align: center;
    margin-bottom: 26px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    font-size: 1.5rem;
    color: var(--purple-main);
}

.logo h1 {
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #fff;
}

.logo span { color: var(--purple-main); }

.login-header p {
    color: var(--text-muted);
    font-size: 0.86rem;
    margin-top: 6px;
}

.login-header-compact {
    text-align: left;
    margin-bottom: 20px;
}
.login-header-compact p {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
}

/* ============ CHECKBOX ROW (lembrar-me / termos) ============ */
.checkbox-row {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    cursor: pointer;
    margin-top: -4px;
}
.checkbox-row input[type="checkbox"] {
    margin-top: 2px;
    width: 15px; height: 15px;
    accent-color: var(--purple-main);
    flex-shrink: 0;
    cursor: pointer;
}
.checkbox-row span {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.45;
}

/* ============ TABS ============ */
.auth-tabs {
    position: relative;
    display: flex;
    gap: 4px;
    background: rgba(0, 0, 0, 0.32);
    padding: 4px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.auth-tabs::before {
    content: '';
    position: absolute;
    top: 4px; left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    background: linear-gradient(135deg, var(--purple-main), var(--purple-deep));
    border-radius: 8px;
    box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
    transition: transform 0.32s cubic-bezier(0.65, 0, 0.35, 1);
    z-index: 0;
}
.auth-tabs.tab-register::before {
    transform: translateX(calc(100% + 4px));
}

.tab-btn {
    position: relative;
    z-index: 1;
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    transition: color 0.25s;
}

.tab-btn.active { color: #ffffff; }

/* ============ FORMS ============ */
.auth-form {
    display: none;
    flex-direction: column;
    gap: 17px;
}
.auth-form.active {
    display: flex;
    animation: form-in 0.35s ease;
}
@keyframes form-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    text-align: center;
}

.input-field {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

label {
    font-size: 0.8rem;
    color: var(--text-soft);
    font-weight: 600;
}

.forgot-pass {
    font-size: 0.78rem;
    color: var(--purple-neon);
    text-decoration: none;
    transition: color 0.2s;
}
.forgot-pass:hover { color: #fff; text-decoration: underline; }

.input-box {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 15px;
    color: #6b7280;
    font-size: 0.95rem;
    transition: color 0.2s;
    pointer-events: none;
}

.input-box input {
    width: 100%;
    padding: 13px 14px 13px 42px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-line);
    border-radius: 11px;
    color: #fff;
    font-size: 0.92rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
}

.input-box input::placeholder { color: rgba(255,255,255,0.28); }

.input-box:has(input:focus) .input-icon { color: var(--purple-neon); }

.input-box input:focus {
    border-color: var(--purple-main);
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.input-box input.field-valid { border-color: rgba(52, 211, 153, 0.5); }
.input-box input.field-invalid { border-color: rgba(248, 113, 113, 0.5); }

.toggle-pass {
    position: absolute;
    right: 6px;
    background: transparent;
    border: none;
    color: #6b7280;
    padding: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: color 0.2s, background 0.2s;
}
.toggle-pass:hover { color: var(--purple-neon); background: rgba(139, 92, 246, 0.1); }

.field-hint {
    font-size: 0.72rem;
    color: var(--text-muted);
    min-height: 14px;
}
.field-hint.error { color: var(--danger); }
.field-hint.success { color: var(--success); }

/* Password strength meter */
.strength-meter {
    display: flex;
    gap: 4px;
    margin-top: 2px;
}
.strength-meter span {
    flex: 1;
    height: 3px;
    border-radius: 2px;
    background: rgba(255,255,255,0.08);
    transition: background 0.25s;
}
.strength-meter[data-level="1"] span:nth-child(1) { background: var(--danger); }
.strength-meter[data-level="2"] span:nth-child(-n+2) { background: #fbbf24; }
.strength-meter[data-level="3"] span:nth-child(-n+3) { background: #a3e635; }
.strength-meter[data-level="4"] span { background: var(--success); }

/* ============ BUTTONS & SPINNER ============ */
.btn-primary {
    position: relative;
    background: linear-gradient(135deg, var(--purple-main) 0%, var(--purple-deep) 100%);
    color: #fff;
    border: none;
    padding: 14px;
    border-radius: 11px;
    font-size: 0.92rem;
    font-family: inherit;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 4px;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
}

.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-primary:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

/* Spinner de Carregamento */
.btn-primary .spinner {
    display: none;
    width: 16px; 
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    will-change: transform;
}

.btn-primary.is-loading .spinner { 
    display: inline-block; 
}

.btn-primary.is-loading .btn-label,
.btn-primary.is-loading i:not(.spinner) { 
    display: none; 
}

@keyframes spin { 
    to { transform: rotate(360deg); } 
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-line);
    color: var(--text-soft);
    padding: 12px;
    border-radius: 11px;
    font-size: 0.88rem;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.05); border-color: rgba(255,255,255,0.2); }

.login-footer {
    margin-top: 26px;
    text-align: center;
    border-top: 1px solid var(--border-line);
    padding-top: 16px;
}
.login-footer p {
    font-size: 0.76rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* ============ TOASTS ============ */
.toast-stack {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 320px;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: #150d2a;
    border: 1px solid var(--border-line);
    border-left: 3px solid var(--purple-main);
    padding: 13px 16px;
    border-radius: 12px;
    font-size: 0.84rem;
    color: var(--text-soft);
    box-shadow: 0 12px 30px rgba(0,0,0,0.5);
    animation: toast-in 0.3s ease;
}
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-success { border-left-color: var(--success); }
.toast i { margin-top: 1px; }
.toast.toast-error i { color: var(--danger); }
.toast.toast-success i { color: var(--success); }
.toast.toast-info i { color: var(--purple-neon); }

@keyframes toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
.toast.toast-out { animation: toast-out 0.25s ease forwards; }
@keyframes toast-out {
    to { opacity: 0; transform: translateX(20px); }
}

@media (max-width: 480px) {
    .login-clean-container { padding: 30px 22px 24px; border-radius: 18px; }
    .toast-stack { left: 16px; right: 16px; max-width: none; }
}