:root {
    --neon-cyan: #00f3ff;
    --neon-pink: #ff0055;
    --neon-green: #00ff9d;
    --bg-dark: #05080a;
    --glass-bg: rgba(10, 15, 20, 0.7);
    --font-ui: 'Rajdhani', sans-serif;
    --font-code: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-dark);
    font-family: var(--font-ui);
    /* ⚡ FIX: min-height allows growing on small screens */
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    /* ⚡ FIX: Allow vertical scroll */
    overflow-y: auto;
    overflow-x: hidden;
    color: #fff;
    padding: 40px 20px;
}

/* --- BACKGROUND --- */
#matrixCanvas {
    /* ⚡ FIX: Fixed position keeps rain static while content scrolls */
    position: fixed; 
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; opacity: 0.3;
}

/* --- CONTAINER --- */
.auth-wrapper {
    width: 100%;
    max-width: 400px;
    position: relative;
    z-index: 10;
    text-align: center;
}

.logo-area { margin-bottom: 30px; }
.logo-area h1 {
    font-size: 2.5rem; color: #fff;
    text-shadow: 0 0 15px var(--neon-cyan);
    font-weight: 800; letter-spacing: 2px;
}
.logo-area p {
    font-family: var(--font-code); color: var(--neon-green);
    font-size: 0.8rem; letter-spacing: 2px;
}

/* --- AUTH BOX (Glass Effect) --- */
.auth-box {
    background: var(--glass-bg);
    border: 1px solid rgba(0, 243, 255, 0.3);
    padding: 30px;
    box-shadow: 0 0 30px rgba(0,0,0,0.8);
    backdrop-filter: blur(5px);
    position: relative;
}
.hidden { display: none; }

.auth-box h2 {
    color: var(--neon-cyan);
    font-size: 1.2rem; margin-bottom: 25px;
    font-family: var(--font-code);
    text-align: left;
    border-bottom: 1px solid rgba(0, 243, 255, 0.2);
    padding-bottom: 10px;
}

/* --- INPUT FIELDS --- */
.input-group {
    position: relative; margin-bottom: 20px;
}

.input-group .icon {
    position: absolute;
    left: 0;
    top: 0;
    height: 45px;
    width: 45px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--neon-cyan);
    font-size: 0.9rem;
    pointer-events: none;
    z-index: 2;
}

.input-group input {
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid #333;
    padding: 12px 12px 12px 45px;
    color: #fff;
    font-family: var(--font-code);
    font-size: 0.9rem;
    outline: none;
    transition: 0.3s;
    height: 45px;
}

.input-group input:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.2);
}

.password-toggle {
    position: absolute;
    right: 0; top: 0; height: 45px; width: 40px;
    display: flex; justify-content: center; align-items: center;
    background: none; border: none; color: #666; cursor: pointer;
}
.password-toggle:hover { color: #fff; }

/* --- CHECKBOX --- */
.options { text-align: left; margin-bottom: 20px; }
.checkbox-container {
    display: block; position: relative; padding-left: 30px;
    cursor: pointer; font-size: 0.8rem; color: #aaa;
    user-select: none; font-family: var(--font-code);
}
.checkbox-container input { position: absolute; opacity: 0; cursor: pointer; height: 0; width: 0; }
.checkmark {
    position: absolute; top: 0; left: 0; height: 18px; width: 18px;
    background-color: #222; border: 1px solid #555;
}
.checkbox-container:hover input ~ .checkmark { background-color: #333; }
.checkbox-container input:checked ~ .checkmark { background-color: var(--neon-cyan); border-color: var(--neon-cyan); }
.checkmark:after { content: ""; position: absolute; display: none; }
.checkbox-container input:checked ~ .checkmark:after { display: block; }
.checkbox-container .checkmark:after {
    left: 5px; top: 2px; width: 4px; height: 8px;
    border: solid #000; border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* --- CYBER BUTTON --- */
.cyber-btn {
    width: 100%;
    padding: 15px;
    background: transparent;
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    font-family: var(--font-ui);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 2px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: 0.3s;
    text-transform: uppercase;
}
.cyber-btn:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 25px var(--neon-cyan);
}
.cyber-btn:disabled {
    cursor: not-allowed;
    border-color: #444; color: #666; background: transparent; box-shadow: none;
}

/* --- BUTTON STATE OVERRIDES (Important for Signup Visuals) --- */
.cyber-btn.btn-loading {
    border-color: var(--neon-pink) !important;
    color: var(--neon-pink) !important;
    background: rgba(255, 0, 85, 0.1) !important;
    cursor: wait !important;
    box-shadow: none !important;
}
.cyber-btn.btn-error {
    border-color: var(--neon-pink) !important;
    background: var(--neon-pink) !important;
    color: #fff !important;
    box-shadow: 0 0 15px var(--neon-pink) !important;
    cursor: not-allowed !important;
}
.cyber-btn.btn-success {
    border-color: var(--neon-green) !important;
    color: var(--neon-green) !important;
    background: rgba(0, 255, 157, 0.1) !important;
    cursor: default !important;
    box-shadow: 0 0 15px var(--neon-green) !important;
}

/* --- EXTRAS --- */
.switch-mode { margin-top: 20px; font-size: 0.9rem; color: #888; }
.switch-mode a { color: var(--neon-cyan); text-decoration: none; font-weight: 700; margin-left: 5px; }
.switch-mode a:hover { text-decoration: underline; text-shadow: 0 0 8px var(--neon-cyan); }

.validation-msg {
    display: block; font-size: 0.7rem; font-family: var(--font-code);
    text-align: right; margin-top: 5px; min-height: 15px;
}
.valid { border-color: var(--neon-green) !important; }
.invalid { border-color: var(--neon-pink) !important; }