:root {
    --bg-dark: #0f172a;
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --secondary: #ec4899;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --error: #ef4444;
    --success: #10b981;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* Background Blobs */
.background-blobs {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 10s infinite ease-in-out;
}

.blob-1 {
    width: 300px;
    height: 300px;
    background: var(--primary);
    top: -50px;
    left: -50px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -100px;
    right: -100px;
    animation-delay: 2s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: #3b82f6;
    top: 40%;
    left: 40%;
    animation-delay: 4s;
    opacity: 0.4;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

/* Common Layout */
.screen {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease, transform 0.5s ease;
    transform: scale(0.95);
}

.screen.active {
    opacity: 1;
    pointer-events: all;
    transform: scale(1);
}

.screen.hidden {
    display: none; /* Helper to fully remove from flow if needed, though opacity handles visual */
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--glass-shadow);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.glass {
    /* Utility class included in card */
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: center;
}

/* Inputs & Buttons */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 0.85rem;
    color: var(--text-main);
    margin-left: 4px;
}

input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    padding: 16px;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

input:focus {
    border-color: var(--primary);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border: none;
    padding: 16px;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(139, 92, 246, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    padding: 16px;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: underline;
    margin-top: 10px;
}

/* Login Specific */
.error {
    color: var(--error);
    font-size: 0.85rem;
    text-align: center;
    margin-top: 5px;
}

.shake {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Quiz Specific */
.progress-container {
    background: rgba(255, 255, 255, 0.1);
    height: 6px;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    width: 0%;
    transition: width 0.4s ease;
}

.step-indicator {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.question-text {
    font-size: 1.25rem;
    text-align: left;
    margin-bottom: 24px;
}

.options-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 14px 20px;
    border-radius: 12px;
    color: var(--text-main);
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
}

.option-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.option-btn.selected {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Results */
.score-display {
    font-size: 4rem;
    font-weight: 700;
    margin: 20px 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.score-total {
    font-size: 1.5rem;
    color: var(--text-muted);
    -webkit-text-fill-color: var(--text-muted);
}

.text-center {
    text-align: center;
    align-items: center;
}

/* Loader */
.loader-content {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: var(--secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 24px;
}

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

.typewriter {
    overflow: hidden;
    white-space: nowrap;
    margin: 0 auto;
    animation: typing 3.5s steps(40, end);
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

/* Gift */
.gift-icon {
    font-size: 4rem;
    text-align: center;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-20px);}
    60% {transform: translateY(-10px);}
}

.gift-subtitle {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.gift-image {
    width: 100%;
    border-radius: 16px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    object-fit: cover;
}

.hidden-panel {
    display: none;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--glass-border);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Utilities */
.hidden {
    display: none !important;
}