:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg-dark: #0F172A;
    --surface: rgba(30, 41, 59, 0.7);
    --border: rgba(255, 255, 255, 0.1);
    --text: #F8FAFC;
    --text-muted: #94A3B8;
    --error: #EF4444;
}

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

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

/* Beautiful dynamic mesh gradient background */
.background-mesh {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: 
        radial-gradient(circle at 15% 50%, rgba(79, 70, 229, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(147, 51, 234, 0.15), transparent 25%);
    z-index: 0;
    animation: pulse 15s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

/* Glassmorphism panel */
.login-box {
    background: var(--surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.logo-container {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary), #9333EA);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
}

.logo-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.logo-container p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.5;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: white;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.input-group input::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

/* Role Selector Toggle */
.role-selector {
    display: flex;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 24px;
    border: 1px solid var(--border);
}

.role-radio {
    flex: 1;
    position: relative;
    cursor: pointer;
}

.role-radio input {
    position: absolute;
    opacity: 0;
}

.role-btn {
    display: block;
    text-align: center;
    padding: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: 8px;
    transition: all 0.2s;
}

.role-radio input:checked + .role-btn {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.error-message {
    color: var(--error);
    font-size: 13px;
    text-align: center;
    margin-bottom: 16px;
    min-height: 20px;
    font-weight: 500;
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
}

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

.footer-links {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

/* Loader */
.loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -10px;
    margin-top: -10px;
}

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

.hidden {
    display: none !important;
}