:root {
    --bg: #000000;
    --surface: #070707;
    --text: #ffffff;
    --muted: #8a8a8a;
    --accent: #22c55e;
    --accent-dark: #16a34a;
    --accent-soft: rgba(34, 197, 94, 0.14);
    --danger: #f87171;
    --border: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(34, 197, 94, 0.35);
    --input: #0c0c0c;
    --font-display: "Space Grotesk", sans-serif;
    --font-body: "DM Sans", sans-serif;
}

* {
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: rgba(34, 197, 94, 0.45) #0a0a0a;
}

*::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

*::-webkit-scrollbar-track {
    background: #0a0a0a;
    border-left: 1px solid rgba(255, 255, 255, 0.06);
}

*::-webkit-scrollbar-thumb {
    background: linear-gradient(
        180deg,
        rgba(34, 197, 94, 0.55) 0%,
        rgba(34, 197, 94, 0.28) 100%
    );
    border: 2px solid #0a0a0a;
    border-radius: 2px;
}

*::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(
        180deg,
        rgba(34, 197, 94, 0.8) 0%,
        rgba(34, 197, 94, 0.45) 100%
    );
}

*::-webkit-scrollbar-corner {
    background: #0a0a0a;
}

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

body {
    min-height: 100vh;
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

.login-shell {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    min-height: 100vh;
}

/* —— Brand panel —— */
.login-brand {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(2rem, 5vw, 3.5rem);
    overflow: hidden;
    background:
        linear-gradient(160deg, rgba(34, 197, 94, 0.12) 0%, transparent 42%),
        linear-gradient(0deg, #000 0%, #050505 100%);
    border-right: 1px solid var(--border);
    animation: brand-in 0.7s ease both;
}

.brand-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(34, 197, 94, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 197, 94, 0.07) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 70% at 30% 40%, #000 20%, transparent 75%);
    animation: grid-drift 18s linear infinite;
    pointer-events: none;
}

.brand-grid::after {
    content: "";
    position: absolute;
    width: 14rem;
    height: 14rem;
    top: 28%;
    left: 18%;
    border: 1px solid rgba(34, 197, 94, 0.28);
    border-radius: 50%;
    animation: pulse-ring 4.5s ease-in-out infinite;
}

.brand-content {
    position: relative;
    z-index: 1;
    margin-top: auto;
    margin-bottom: auto;
    max-width: 22rem;
}

.brand-name {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem 0.7rem;
    margin: 0 0 1rem;
    font-family: var(--font-display);
    font-size: clamp(2.75rem, 6.5vw, 4.75rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.04em;
    color: var(--text);
}

.brand-es {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.55em;
    padding: 0.28em 0.48em 0.3em 0.34em;
    background: var(--accent);
    color: #000000;
    font-size: 0.62em;
    font-weight: 700;
    letter-spacing: -0.08em;
    line-height: 1;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
    animation: es-mark-in 0.55s 0.1s ease both;
}

.brand-es-signal {
    position: absolute;
    top: 0.28em;
    right: 0.32em;
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 0.42em;
}

.brand-es-signal::before,
.brand-es-signal::after {
    content: "";
    display: block;
    width: 2px;
    background: #000000;
    border-radius: 1px;
    transform-origin: bottom;
}

.brand-es-signal::before {
    height: 55%;
    animation: signal-bar 1.4s 0.4s ease-in-out infinite;
}

.brand-es-signal::after {
    height: 100%;
    animation: signal-bar 1.4s 0.7s ease-in-out infinite;
}

.brand-rest {
    display: block;
    max-width: 6.5ch;
}

.brand-name::after {
    content: "";
    display: block;
    flex-basis: 100%;
    width: 3rem;
    height: 3px;
    margin-top: 0.35rem;
    background: var(--accent);
    animation: bar-grow 0.8s 0.25s ease both;
}

.brand-tagline {
    margin: 0;
    max-width: 18rem;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.55;
    animation: fade-up 0.6s 0.2s ease both;
}

.brand-foot {
    position: relative;
    z-index: 1;
    margin: 0;
    color: var(--muted);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

/* —— Form panel —— */
.login-panel {
    display: grid;
    place-items: center;
    padding: clamp(1.5rem, 4vw, 3rem);
    background: var(--surface);
}

.panel-inner {
    width: min(380px, 100%);
    animation: fade-up 0.65s 0.15s ease both;
}

.panel-header {
    margin-bottom: 2rem;
}

.panel-header h1 {
    margin: 0 0 0.4rem;
    font-family: var(--font-display);
    font-size: 1.85rem;
    font-weight: 600;
    letter-spacing: -0.03em;
}

.panel-header p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.error {
    margin: 0 0 1.25rem;
    padding: 0.8rem 0.95rem;
    border: 1px solid rgba(248, 113, 113, 0.35);
    border-left: 3px solid var(--danger);
    background: rgba(248, 113, 113, 0.08);
    color: var(--danger);
    font-size: 0.9rem;
    line-height: 1.4;
}

.field {
    margin-bottom: 1.15rem;
}

label {
    display: block;
    margin: 0 0 0.45rem;
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

input {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    background: var(--input);
    color: var(--text);
    font: inherit;
    font-size: 0.95rem;
    transition: border-color 0.18s ease, background 0.18s ease;
}

input::placeholder {
    color: #4a4a4a;
}

input:hover {
    border-color: rgba(255, 255, 255, 0.18);
}

input:focus {
    outline: none;
    border-color: var(--accent);
    background: #0a0a0a;
    box-shadow: 0 0 0 3px var(--accent-soft);
}

input:disabled {
    opacity: 0.7;
}

.btn-login {
    position: relative;
    width: 100%;
    margin-top: 0.65rem;
    padding: 1.05rem 1.25rem;
    border: 0;
    border-radius: 2px;
    background: var(--accent);
    color: #000000;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    overflow: hidden;
    isolation: isolate;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
    transition: background 0.2s ease, transform 0.18s ease, letter-spacing 0.2s ease;
}

.btn-login::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        105deg,
        transparent 38%,
        rgba(255, 255, 255, 0.22) 50%,
        transparent 62%
    );
    transform: translateX(-130%);
    transition: transform 0.5s ease;
    pointer-events: none;
    z-index: 0;
}

.btn-login::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: #000000;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.28s ease;
    z-index: 1;
}

.btn-login > * {
    position: relative;
    z-index: 1;
}

.btn-login:hover:not(:disabled) {
    background: #1fbf57;
    letter-spacing: 0.08em;
}

.btn-login:hover:not(:disabled)::before {
    transform: translateX(130%);
}

.btn-login:hover:not(:disabled)::after {
    transform: scaleX(1);
}

.btn-login:active:not(:disabled) {
    transform: translateY(1px);
}

.btn-login:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.btn-login:disabled {
    cursor: wait;
    opacity: 0.88;
}

.btn-login .spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(0, 0, 0, 0.22);
    border-top-color: #000000;
    border-radius: 50%;
    display: none;
    animation: login-spin 0.7s linear infinite;
}

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

/* —— Motion —— */
@keyframes brand-in {
    from {
        opacity: 0;
        transform: translateX(-12px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes bar-grow {
    from {
        width: 0;
        opacity: 0;
    }
    to {
        width: 3rem;
        opacity: 1;
    }
}

@keyframes es-mark-in {
    from {
        opacity: 0;
        transform: translateY(8px) scale(0.92);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes signal-bar {
    0%,
    100% {
        opacity: 0.35;
        transform: scaleY(0.65);
    }
    50% {
        opacity: 1;
        transform: scaleY(1);
    }
}

@keyframes grid-drift {
    from {
        background-position: 0 0, 0 0;
    }
    to {
        background-position: 48px 48px, 48px 48px;
    }
}

@keyframes pulse-ring {
    0%,
    100% {
        transform: scale(1);
        opacity: 0.55;
    }
    50% {
        transform: scale(1.12);
        opacity: 0.2;
    }
}

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

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* —— Responsive —— */
@media (max-width: 860px) {
    .login-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .login-brand {
        min-height: 34vh;
        padding: 1.75rem 1.5rem;
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }

    .brand-content {
        margin: 0;
    }

    .brand-name {
        font-size: clamp(2.4rem, 12vw, 3.4rem);
    }

    .brand-foot {
        display: none;
    }

    .login-panel {
        place-items: start center;
        padding-top: 2.25rem;
    }
}