/* ===== CSS VÁLTOZÓK ===== */
:root {
    --bg-primary: #0a0b15;
    --bg-secondary: rgba(17, 19, 26, 0.9);
    --bg-glass: rgba(17, 19, 26, 0.7);
    --bg-input: rgba(20, 22, 32, 0.95);
    --border-glass: rgba(110, 91, 255, 0.35);
    --border-neon: #6e5bff;
    --text-primary: #ffffff;
    --text-secondary: #bfc3d9;
    --text-glow: #f0f2ff;
    --accent-primary: #6d5acd;
    --accent-secondary: #ff6b9d;
    --accent-glow: rgba(110, 91, 255, 0.7);
    --error-neon: #ff4757;
    --success-neon: #2ed573;
    --shadow-neon: 0 0 25px rgba(110, 91, 255, 0.45);
    --shadow-glow: 0 25px 55px rgba(0,0,0,0.65);
    --radius: 18px;
    --transition: all 0.3s cubic-bezier(0.23, 1, 0.320, 1);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*, *::before, *::after {
    color: inherit;
}

body {
    background: var(--bg-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: clamp(1rem, 3vw, 1.5rem);
    display: grid;
    place-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ===== PARTICLE BACKGROUND ===== */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(120,119,198,0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,119,198,0.25) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120,219,255,0.25) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
    z-index: -2;
}

@keyframes float {
    0%, 100% { transform: scale(1) rotate(0deg); }
    33% { transform: scale(1.05) rotate(120deg); }
    66% { transform: scale(1.1) rotate(240deg); }
}

/* ===== CONTAINER ===== */
.login-container {
    width: 100%;
    max-width: clamp(380px, 90vw, 420px);
}

/* ===== GLASS CARD ===== */
.login-card {
    background: var(--bg-glass);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    padding: clamp(2.5rem, 6vw, 3rem) clamp(2rem, 5vw, 2.5rem);
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-glow), var(--shadow-neon);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

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

.login-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent);
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 60px rgba(110, 91, 255, 0.3);
}

/* ===== TITLE ===== */
.login-title {
    text-align: center;
    margin-bottom: 2.25rem;
    font-size: clamp(1.75rem, 4.5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: 1.5px;
    background: linear-gradient(135deg, var(--text-primary), var(--border-neon), var(--accent-secondary));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease-in-out infinite;
    text-shadow: 0 0 30px rgba(110, 91, 255, 0.4);
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ===== ALERTS ===== */
.login-error,
.login-success {
    padding: 1.125rem 1.5rem;
    margin-bottom: 1.75rem;
    border-radius: 14px;
    font-size: 0.95rem;
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.5px;
    animation: slideIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border: 2px solid;
}

.login-error {
    background: rgba(255, 71, 87, 0.2);
    border-color: var(--error-neon);
    color: #ffe6e6;
    box-shadow: 0 0 25px rgba(255, 71, 87, 0.4);
}

.login-success {
    background: rgba(46, 213, 115, 0.2);
    border-color: var(--success-neon);
    color: #e6ffed;
    box-shadow: 0 0 25px rgba(46, 213, 115, 0.4);
}

@keyframes slideIn {
    0% {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== INPUT GROUP ===== */
.input-group {
    position: relative;
    margin-bottom: 2rem;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 1.25rem 1.25rem 1rem 1.25rem;
    min-height: 56px;
    background: var(--bg-input);
    backdrop-filter: blur(12px);
    border: 2px solid var(--border-glass);
    border-radius: 16px;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    border-color: var(--border-neon);
    box-shadow: 0 0 0 4px rgba(110, 91, 255, 0.2), var(--shadow-neon);
    transform: translateY(-2px);
}

.input-group input::placeholder {
    color: transparent;
}

.input-group label {
    position: absolute;
    left: 1.25rem;
    top: 1.25rem;
    color: var(--text-secondary);
    pointer-events: none;
    transition: var(--transition);
    font-weight: 600;
    font-size: 1rem;
    z-index: 1;
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group input:valid + label,
.input-group select:focus + label {
    top: 0.25rem;
    left: 1rem;
    padding: 0 0.75rem;
    font-size: 0.8rem;
    color: var(--border-neon);
    background: var(--bg-secondary);
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.4);
}

/* SELECT STYLING */
.input-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23bfc3d9' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 1rem center;
    background-repeat: no-repeat;
    background-size: 18px;
    padding-right: 3rem;
    appearance: none;
}

/* ===== BUTTON ===== */
.login-btn {
    width: 100%;
    padding: 1.25rem 2rem;
    border: none;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    background-size: 200% 200%;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 16px;
    cursor: pointer;
    margin-top: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: inherit;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 20px 40px rgba(109, 90, 205, 0.5), 0 0 40px var(--accent-glow);
    animation: gradientShift 1s ease-in-out infinite;
}

.login-btn:active {
    transform: translateY(-1px) scale(1.01);
}

/* ===== LINKS ===== */
.register-link,
.forgot-link {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.register-link.small {
    font-size: 0.85rem;
}

.register-link a,
.forgot-link a {
    color: var(--text-glow);
    text-decoration: none;
    position: relative;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    display: inline-block;
}

.register-link a::before,
.forgot-link a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--border-neon), var(--accent-secondary));
    transition: var(--transition);
    transform: translateX(-50%);
}

.register-link a:hover::before,
.forgot-link a:hover::before {
    width: 100%;
    left: 0;
}

.register-link a:hover,
.forgot-link a:hover {
    color: var(--border-neon);
    text-shadow: 0 0 20px var(--accent-glow);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
    body {
        padding: 1rem;
    }
    
    .login-card {
        padding: 2rem 1.75rem;
        margin: 0.5rem;
    }
    
    .input-group {
        margin-bottom: 1.75rem;
    }
}