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

:root {
    --bg-deep: #0f0f0f;
    --bg-card: #1a1a1a;
    --bg-input: #242424;
    --border: #2a2a2a;
    --border-focus: #c9a96e;
    --accent: #c9a96e;
    --accent-glow: rgba(201, 169, 110, 0.15);
    --text: #e8e4dd;
    --text-muted: #7a756d;
    --error: #d4685a;
    --error-bg: rgba(212, 104, 90, 0.08);
}

body {
    font-family: 'IBM Plex Sans', sans-serif;
    background: var(--bg-deep);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Subtle geometric background pattern */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        linear-gradient(135deg, transparent 40%, var(--accent-glow) 50%, transparent 60%),
        radial-gradient(ellipse at 20% 80%, rgba(201, 169, 110, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(201, 169, 110, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

/* Grid lines background */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.15;
    pointer-events: none;
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 0 24px;
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.brand {
    text-align: center;
    margin-bottom: 48px;
}

.brand-mark {
    display: inline-block;
    width: 72px;
    height: 72px;
    margin-bottom: 24px;
    filter: brightness(0.85) sepia(0.3) hue-rotate(10deg) saturate(0.8);
}

.brand-mark img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.brand h1 {
    font-family: 'DM Serif Display', serif;
    font-size: 26px;
    font-weight: 400;
    letter-spacing: 0.5px;
    color: var(--text);
    margin-bottom: 8px;
}

.brand p {
    font-size: 13px;
    font-weight: 300;
    color: var(--text-muted);
    letter-spacing: 2.5px;
    text-transform: uppercase;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px 36px;
    position: relative;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 36px;
    right: 36px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.4;
}

.field {
    margin-bottom: 24px;
}

.field label {
    display: block;
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.field input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 15px;
    font-weight: 400;
    transition: border-color 0.25s, box-shadow 0.25s;
    outline: none;
}

.field input::placeholder {
    color: #4a4640;
}

.field input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: var(--accent);
    color: var(--bg-deep);
    border: none;
    border-radius: 4px;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: background 0.25s, transform 0.15s;
    margin-top: 8px;
}

.btn-login:hover {
    background: #d4b478;
}

.btn-login:active {
    transform: scale(0.985);
}

.error-msg {
    background: var(--error-bg);
    border: 1px solid rgba(212, 104, 90, 0.2);
    border-radius: 4px;
    padding: 12px 16px;
    margin-bottom: 24px;
    font-size: 13px;
    color: var(--error);
    animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shake {
    10%, 90% { transform: translateX(-1px); }
    20%, 80% { transform: translateX(2px); }
    30%, 50%, 70% { transform: translateX(-3px); }
    40%, 60% { transform: translateX(3px); }
}

.footer-note {
    text-align: center;
    margin-top: 32px;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}