:root {
    --bg-base: #121316;
    --bg-card: rgba(24, 25, 30, 0.88);
    --border-card: rgba(255, 255, 255, 0.08);
    --text-main: #f4f4f5;
    --text-muted: #9fa3ad;
    --accent-color: #c64942;
    --accent-hover: #b03e38;
    --accent-active: #99342f;
    --accent-glow: rgba(198, 73, 66, 0.3);
    --danger-color: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --danger-border: rgba(239, 68, 68, 0.35);
    --success-color: #10b981;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background-image: none;
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-card);
    border-radius: 20px;
    box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.04);
    width: 100%;
    max-width: 395px;
    padding: 2.75rem 2.25rem;
    text-align: center;
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-icon-wrap {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    border-radius: 18px;
    background: rgba(198, 73, 66, 0.12);
    border: 1px solid rgba(198, 73, 66, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    box-shadow: 0 0 24px var(--accent-glow);
}

.service-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.95rem;
    background: rgba(198, 73, 66, 0.12);
    border: 1px solid rgba(198, 73, 66, 0.28);
    border-radius: 9999px;
    color: #fca5a1;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.85rem;
}

.service-badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--accent-color);
    box-shadow: 0 0 8px var(--accent-color);
}

.login-title, h1 {
    font-size: 1.55rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 2.35rem;
    color: #ffffff;
}

.login-subtitle, .subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1.75rem;
    line-height: 1.45;
}

/* Campo de Email / Nombre de Usuario */
.field-group {
    margin-bottom: 1.25rem;
    text-align: left;
}

.field-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.field-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.field-wrapper svg {
    position: absolute;
    left: 1.1rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: color 0.2s;
}

.text-input {
    width: 100%;
    height: 54px;
    padding: 0 1.1rem 0 2.9rem;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    color: #ffffff;
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.text-input::placeholder {
    color: #636674;
}

.text-input:hover {
    border-color: rgba(255, 255, 255, 0.22);
}

.text-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: rgba(255, 255, 255, 0.05);
}

.field-wrapper:focus-within svg {
    color: var(--accent-color);
}

/* Clave de Acceso (PIN) */
.pin-label-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.pin-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-align: left;
}

.pin-container {
    display: flex;
    gap: 0.85rem;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.pin-box {
    width: 68px;
    height: 68px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    color: #ffffff;
    font-size: 1.85rem;
    font-weight: 700;
    text-align: center;
    font-family: inherit;
    outline: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    caret-color: var(--accent-color);
}

.pin-box:hover {
    border-color: rgba(255, 255, 255, 0.22);
}

.pin-box:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-glow);
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.05);
}

.pin-box.filled {
    border-color: rgba(198, 73, 66, 0.7);
    color: #ffffff;
}

.pin-container.shake {
    animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
}

.pin-container.shake .pin-box {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.3);
}

@keyframes shake {
    10%, 90% { transform: translate3d(-2px, 0, 0); }
    20%, 80% { transform: translate3d(4px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-6px, 0, 0); }
    40%, 60% { transform: translate3d(6px, 0, 0); }
}

.options-row {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.toggle-vis-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.82rem;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: color 0.2s;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.toggle-vis-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.error-alert {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: #fca5a5;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    display: none;
    align-items: center;
    gap: 0.6rem;
    text-align: left;
    animation: fadeIn 0.2s ease-out;
}

.error-alert.visible {
    display: flex;
}

.error-alert svg {
    flex-shrink: 0;
}

.btn-login {
    width: 100%;
    padding: 0.95rem 1.25rem;
    background: var(--accent-color);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-login:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(198, 73, 66, 0.45);
}

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

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: spin 0.8s linear infinite;
}

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

.login-footer {
    margin-top: 2rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.service-tag {
    font-weight: 600;
    color: var(--accent-color);
    letter-spacing: 0.02em;
}