:root {
    --bg-color: #ededed; 
    --text-color: #222222;
    --hero-logo-color: #222222;
    --nav-bg: rgba(15, 23, 42, 0.85);
    --nav-border: rgba(255, 255, 255, 0.08);
    --nav-text: #94a3b8;
    --nav-hover: #f1f5f9;
    --nav-active: #cbd5e1;
    --nav-visited: #64748b;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #b0b0b0;
        --hero-logo-color: #888888;
        --nav-bg: rgba(15, 23, 42, 0.75);
        --nav-border: rgba(255, 255, 255, 0.04);
    }
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    text-shadow: none !important; 
    filter: none !important;
}
html, body {
    height: 100%;
}
body {
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    background-color: var(--bg-color) !important;
    color: var(--text-color);
    overflow-x: hidden;
    transition: background-color 0.2s ease, color 0.2s ease;
}
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}
input, button, textarea, select {
    font: inherit;
}
a {
    text-decoration: none;
    color: inherit;
}
.navbar {
    position: fixed;
    top: 5px;
    left: 5px;
    right: 5px;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-radius: 12px;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--nav-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2); 
    transition: background 0.2s ease, border 0.2s ease;
}
.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    color: #f1f5f9;
}
.login-btn {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--nav-text);
    transition: all 0.2s ease;
}
.login-btn:hover {
    color: var(--nav-hover); 
}
.login-btn:active {
    transform: scale(0.95);
    color: var(--nav-active);
}
.login-btn:visited {
    color: var(--nav-visited);
}
.hero {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: transparent !important;
}
.hero-logo {
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 6px;
    color: var(--hero-logo-color);
    transition: color 0.2s ease;
    animation: minimalBreath 6s ease-in-out infinite;
    will-change: transform, opacity;
}
@keyframes minimalBreath {
    0% {
        transform: scale(1);
        opacity: 0.85;
    }
    50% {
        transform: scale(1.03);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 0.85;
    }
}
.login-wrapper {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}
.login-card {
    width: 100%;
    max-width: 420px;
    padding: 40px 30px;
    border-radius: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    color: #0f172a;
}
.login-card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}
.login-card .subtitle {
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 32px;
}
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #475569;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.input-group input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.8);
    color: #0f172a;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}
.input-group input:focus {
    border-color: #0f172a;
    background: #ffffff;
}
.input-group input::placeholder {
    color: #94a3b8;
}
.submit-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: #0f172a;
    color: #ffffff;
}
.submit-btn:hover {
    background-color: #1e293b;
}
.submit-btn:active {
    transform: scale(0.98);
}
@media (prefers-color-scheme: dark) {
    .login-card {
        background: var(--nav-bg);
        border: 1px solid var(--nav-border);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
        color: #f1f5f9;
    }
    .login-card .subtitle {
        color: #94a3b8;
    }
    .input-group label {
        color: #cbd5e1;
    }
    .input-group input {
        border: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(255, 255, 255, 0.05);
        color: #ffffff;
    }
    .input-group input:focus {
        border-color: rgba(255, 255, 255, 0.5);
        background: rgba(255, 255, 255, 0.1);
    }
    .input-group input::placeholder {
        color: #64748b;
    }
    .submit-btn {
        background-color: #334155;
        color: #f1f5f9;
    }
    .submit-btn:hover {
        background-color: #475569;
    }
}
.error-message {
    display: none;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-top: 10px;
    line-height: 1.4;
    background: #fef2f2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}
.error-message.visible {
    display: block;
}
.input-group input.input-error {
    border-color: #ef4444 !important;
    background: #fef2f2 !important;
}

@media (prefers-color-scheme: dark) {
    .error-message {
        background: rgba(239, 68, 68, 0.15);
        border: 1px solid rgba(239, 68, 68, 0.4);
        color: #fca5a5;
    }
    .input-group input.input-error {
        border-color: rgba(239, 68, 68, 0.6) !important;
        background: rgba(239, 68, 68, 0.05) !important;
    }
}
.main-footer {
    position: absolute;
    bottom: 5px;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 10;
    pointer-events: none;
}
.main-footer p {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    color: var(--text-color);
    opacity: 0.5; 
}