:root {
    --ei-ink: #494E52;
    --ei-slate: #656D70;
    --ei-muted: #818C8E;
    --ei-line: #B9C1C4;
    --ei-surface: #DCE0E3;
    --ei-white: #ffffff;
    --ei-accent: #c64040;
    --ei-accent-hover: #a83434;
    --ei-accent-soft: rgba(198, 64, 64, 0.14);
    --ei-teal: var(--ei-accent);
    --ei-teal-deep: var(--ei-accent-hover);
    --ei-teal-soft: #f8ecec;
    --ei-navy: #494E52;
    --ei-danger: var(--ei-accent);
    --ei-font-display: "Fraunces", Georgia, serif;
    --ei-font-body: "Source Sans 3", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
}

body.ei-login {
    font-family: var(--ei-font-body);
    color: var(--ei-ink);
    background: var(--ei-surface);
    -webkit-font-smoothing: antialiased;
}

.ei-login-shell {
    min-height: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
}

/* Brand plane — edge-to-edge visual for Billeo mark */
.ei-login-brand {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(2rem, 5vw, 4.5rem);
    color: var(--ei-ink);
    background:
        radial-gradient(120% 90% at 14% 10%, rgba(255, 255, 255, 0.72) 0%, transparent 55%),
        radial-gradient(90% 70% at 88% 90%, rgba(198, 64, 64, 0.10) 0%, transparent 50%),
        linear-gradient(155deg, #f4f5f6 0%, #dce0e3 48%, #c5ccd1 100%);
    animation: ei-brand-in 700ms ease-out both;
}

.ei-login-brand::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(73, 78, 82, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(73, 78, 82, 0.06) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 85% 75% at 50% 45%, #000 20%, transparent 78%);
    pointer-events: none;
}

.ei-login-brand::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(115deg, transparent 40%, rgba(255, 255, 255, 0.35) 50%, transparent 60%);
    animation: ei-brand-sheen 9s ease-in-out infinite;
    pointer-events: none;
}

.ei-login-brand-atmosphere {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ei-login-brand-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(2px);
}

.ei-login-brand-orb--a {
    width: min(48vw, 22rem);
    height: min(48vw, 22rem);
    top: -12%;
    left: -8%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.65) 0%, transparent 68%);
    animation: ei-orb-drift 12s ease-in-out infinite alternate;
}

.ei-login-brand-orb--b {
    width: min(42vw, 18rem);
    height: min(42vw, 18rem);
    right: -6%;
    bottom: -10%;
    background: radial-gradient(circle, rgba(198, 64, 64, 0.16) 0%, transparent 70%);
    animation: ei-orb-drift 14s ease-in-out infinite alternate-reverse;
}

.ei-login-brand-sheet {
    position: absolute;
    width: min(38%, 15rem);
    aspect-ratio: 3 / 4;
    border: 1px solid rgba(73, 78, 82, 0.12);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.18) 100%);
    border-radius: 2px;
    box-shadow: 0 18px 40px rgba(73, 78, 82, 0.10);
}

.ei-login-brand-sheet::before,
.ei-login-brand-sheet::after {
    content: "";
    position: absolute;
    left: 14%;
    right: 14%;
    height: 1px;
    background: rgba(73, 78, 82, 0.14);
}

.ei-login-brand-sheet::before { top: 22%; }
.ei-login-brand-sheet::after { top: 30%; }

.ei-login-brand-sheet--back {
    top: 14%;
    right: 10%;
    transform: rotate(14deg);
    opacity: 0.7;
    animation: ei-sheet-float 10s ease-in-out infinite;
}

.ei-login-brand-sheet--mid {
    bottom: 16%;
    left: 9%;
    width: min(32%, 12.5rem);
    transform: rotate(-11deg);
    opacity: 0.55;
    animation: ei-sheet-float 11s 0.6s ease-in-out infinite reverse;
}

.ei-login-brand-sheet--front {
    top: 58%;
    right: 18%;
    width: min(26%, 10rem);
    transform: rotate(8deg);
    opacity: 0.45;
    animation: ei-sheet-float 9s 1.2s ease-in-out infinite;
}

.ei-login-brand-inner {
    position: relative;
    z-index: 1;
    width: min(100%, 28rem);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: ei-logo-in 800ms 80ms ease-out both;
}

.ei-login-logo {
    display: block;
    width: min(100%, 22rem);
    height: auto;
    max-height: min(52vh, 220px);
    object-fit: contain;
    border-radius: 6px;
    background: #fffeff;
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.85) inset,
        0 18px 40px rgba(73, 78, 82, 0.14),
        0 6px 14px rgba(73, 78, 82, 0.08);
}

/* Form column */
.ei-login-panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 5vw, 4.5rem);
    background: var(--ei-white);
    animation: ei-panel-in 650ms 120ms ease-out both;
}

.ei-login-panel-inner {
    width: 100%;
    max-width: 22.5rem;
    margin: 0 auto;
}

.ei-login-panel h2 {
    margin: 0 0 0.35rem;
    font-family: var(--ei-font-display);
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--ei-ink);
}

.ei-login-panel .ei-login-lead {
    margin: 0 0 1.75rem;
    color: var(--ei-muted);
    font-size: 1rem;
    line-height: 1.45;
}

.ei-login-error {
    display: none;
    margin: 0 0 1.25rem;
    padding: 0.75rem 0.9rem;
    border-left: 3px solid var(--ei-danger);
    background: var(--ei-surface);
    color: var(--ei-danger);
    font-size: 0.92rem;
    line-height: 1.4;
}

.ei-login-error.is-visible {
    display: block;
}

.ei-login-form .validation-summary-errors {
    margin: 0 0 1.25rem;
    padding: 0.75rem 0.9rem;
    border-left: 3px solid var(--ei-danger);
    background: var(--ei-surface);
    color: var(--ei-danger);
    font-size: 0.92rem;
    text-align: left;
}

.ei-login-form .validation-summary-errors ul {
    margin: 0;
    padding-left: 1.1rem;
}

.ei-field {
    margin-bottom: 1.1rem;
    text-align: left;
    animation: ei-field-in 500ms ease-out both;
}

.ei-field:nth-of-type(1) { animation-delay: 220ms; }
.ei-field:nth-of-type(2) { animation-delay: 320ms; }

.ei-field label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.86rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--ei-slate);
}

.ei-field input {
    display: block;
    width: 100%;
    height: 2.75rem;
    padding: 0 0.9rem;
    border: 1px solid var(--ei-line);
    border-radius: 4px;
    background: var(--ei-white);
    color: var(--ei-ink);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.ei-field input::placeholder {
    color: #818C8E;
}

.ei-field input:hover {
    border-color: #818C8E;
}

.ei-field input:focus {
    outline: none;
    border-color: var(--ei-accent);
    background: var(--ei-teal-soft);
    box-shadow: 0 0 0 3px var(--ei-accent-soft);
}

.ei-login-submit {
    display: block;
    width: 100%;
    margin-top: 0.35rem;
    margin-bottom: 1rem;
    height: 2.85rem;
    border: 0;
    border-radius: 4px;
    background: var(--ei-teal);
    color: var(--ei-white);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background-color 160ms ease, transform 160ms ease;
    animation: ei-field-in 500ms 420ms ease-out both;
}

.ei-login-submit:hover,
.ei-login-submit:focus {
    background: var(--ei-teal-deep);
    outline: none;
}

.ei-login-submit:active {
    transform: translateY(1px);
}

.ei-login-links {
    text-align: left;
    margin-bottom: 2rem;
    animation: ei-field-in 500ms 480ms ease-out both;
}

.ei-login-links a {
    color: var(--ei-accent);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
}

.ei-login-links a:hover,
.ei-login-links a:focus {
    text-decoration: underline;
}

.ei-login-footer {
    margin: 0;
    color: var(--ei-muted);
    font-size: 0.82rem;
    line-height: 1.4;
}

@keyframes ei-brand-in {
    from {
        opacity: 0;
        transform: translateX(-12px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes ei-panel-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes ei-field-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes ei-logo-in {
    from {
        opacity: 0;
        transform: scale(0.96) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes ei-brand-sheen {
    0%,
    100% {
        opacity: 0.35;
        transform: translateX(-8%);
    }
    50% {
        opacity: 0.7;
        transform: translateX(8%);
    }
}

@keyframes ei-orb-drift {
    from {
        transform: translate(0, 0);
    }
    to {
        transform: translate(18px, 12px);
    }
}

@keyframes ei-sheet-float {
    0%,
    100% {
        translate: 0 0;
    }
    50% {
        translate: 0 -10px;
    }
}

@media (max-width: 900px) {
    .ei-login-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .ei-login-brand {
        min-height: 28vh;
        align-items: center;
        padding: 1.75rem 1.5rem 1.5rem;
    }

    .ei-login-brand-sheet--back {
        top: 8%;
        right: 6%;
        width: 5.5rem;
    }

    .ei-login-brand-sheet--mid {
        bottom: 10%;
        left: 6%;
        width: 4.5rem;
    }

    .ei-login-brand-sheet--front {
        display: none;
    }

    .ei-login-logo {
        width: min(70%, 16rem);
        max-height: 120px;
    }

    .ei-login-panel {
        padding: 2rem 1.5rem 2.5rem;
        justify-content: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ei-login-brand,
    .ei-login-brand::after,
    .ei-login-brand-inner,
    .ei-login-brand-orb,
    .ei-login-brand-sheet,
    .ei-login-panel,
    .ei-field,
    .ei-login-submit,
    .ei-login-links {
        animation: none !important;
    }
}