/* cssLogin.css */
:root {
    --bg-color: #0f172a;
    --primary-color: #3b82f6;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(147, 51, 234, 0.15) 0%, transparent 50%),
        linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}

.login-card {
    position: relative;
    width: 400px;
    padding: 40px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    z-index: 10;
}

.login-card::before {
    content: "";
    position: absolute;
    top: var(--y, 0);
    left: var(--x, 0);
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: -1;
}

.login-card:hover::before {
    opacity: 1;
}

.brand-header {
    text-align: center;
    margin-bottom: 30px;
}

.brand-header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.brand-header span {
    color: var(--primary-color);
}

.brand-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 5px;
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group i {
    position: absolute;
    top: 50%;
    left: 15px;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.form-control {
    width: 100%;
    padding: 15px 15px 15px 45px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    background: rgba(0, 0, 0, 0.4);
}

.form-control:focus + i {
    color: var(--primary-color);
}

.form-group i.toggle-password {
    position: absolute;
    left: auto;
    right: 15px;
    cursor: pointer;
    color: var(--text-muted);
}

.form-group i.toggle-password:hover {
    color: var(--text-main);
}

.btn-submit {
    width: 100%;
    padding: 15px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 10px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--primary-color);
}

.btn-submit:active {
    transform: translateY(0);
}

.form-footer {
    margin-top: 25px;
    text-align: center;
    font-size: 0.9rem;
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.form-footer a:hover {
    color: #60a5fa;
    text-decoration: underline;
}

#alert-box {
    display: none;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    text-align: center;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-success {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

@media (max-width: 450px) {
    .login-card {
        width: 90%;
        padding: 30px 20px;
    }
}