:root {
    --primary-color: #2563EB;
    --primary-hover: #1D4ED8;
    --bg-dark: #000000;
    --bg-dark-blue: #0A0E27;
    --text-white: #FFFFFF;
    --text-light: #B8C5D6;
    --border-color: #1E293B;
    --crystal-blue: #60A5FA;
    --crystal-cyan: #22D3EE;
}

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

body {
    font-family: 'Orbitron', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Crystal Background Effect */
.crystal-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, #0A1628 0%, #000000 100%);
    z-index: -1;
}

.crystal-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(45deg, transparent 40%, rgba(96, 165, 250, 0.03) 50%, transparent 60%),
        linear-gradient(-45deg, transparent 40%, rgba(34, 211, 238, 0.03) 50%, transparent 60%);
    background-size: 200px 200px;
    animation: crystalMove 20s linear infinite;
}

@keyframes crystalMove {
    0% {
        background-position: 0 0, 0 0;
    }
    100% {
        background-position: 200px 200px, -200px 200px;
    }
}

/* Splash Screen */
.splash-screen {
    position: fixed;
    background-image: url("assets/5a0588b351be14ff61926fddccbf05e32a009a4d.png");
    background-size: cover;
    background-position: center;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 4rem;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 1s ease-out;
}

.splash-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.758) 0%, rgba(8, 8, 8, 0.588) 23%, rgba(255, 255, 255, 0) 45%);
    z-index: 1;
}

.splash-screen.active {
    opacity: 1;
    pointer-events: all;
}

.splash-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.logo-section {
    margin-bottom: 4rem;
}

.xi-logo {
    font-size: 8rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, #FFFFFF 0%, #B8C5D6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    text-shadow: 0 0 40px rgba(96, 165, 250, 0.5);
}

.event-title {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--text-white);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.event-subtitle {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    color: var(--text-white);
    text-transform: uppercase;
}

.crystal-tree {
    margin-top: 3rem;
    animation: floatTree 3s ease-in-out infinite;
}

.tree-image {
    width: 300px;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(96, 165, 250, 0.6));
}

@keyframes floatTree {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

/* Main Screen */
.main-screen {
    background-image: url("assets/signing.png");
    background-size: cover;
    background-position: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.main-screen.active {
    opacity: 1;
    transform: scale(1);
}

.form-container {
    width: 100%;
    max-width: 520px;
    text-align: center;
    position: relative;
}

.form-header {
    margin-bottom: 2.5rem;
}

.form-header .xi-logo {
    font-size: 4rem;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.form-header .event-title,
.form-header .event-subtitle {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.welcome-section {
    margin-bottom: 2rem;
}

.welcome-text {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--text-white);
    text-transform: uppercase;
}

/* Form Styling */
form {
    width: 100%;
}

/* Form Steps */
.form-step {
    display: none;
    animation: fadeIn 0.5s ease;
}

.form-step.active {
    display: block;
}

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

.verification-info {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 12px;
    text-align: center;
}

.verification-info p {
    color: var(--text-light);
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 0;
}

.verification-info strong {
    color: var(--crystal-blue);
    font-weight: 600;
}

.form-group {
    margin-bottom: 2rem;
    position: relative;
}

label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: #C8DFFF;
    position: relative;
    top: 0.65rem;
    left: 0.5rem;
    margin: 0 0 0 7px;
    padding: 0 6px;
    width: fit-content;
    letter-spacing: 0.05em;
    z-index: 1;
}

input {
    width: 100%;
    height: 3.5rem;
    padding: 1rem 1.25rem;
    background: #000000;
    border: 2px solid #C8DFFF;
    border-radius: 16px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.875rem;
    color: #FFFFFF;
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 0 20px rgba(200, 223, 255, 0.3), inset 0 0 20px rgba(200, 223, 255, 0.1);
}


input:focus {
    outline: none;
    border-color: #C8DFFF;
    background: #000000;
    box-shadow: 0 0 30px rgba(200, 223, 255, 0.5), inset 0 0 30px rgba(200, 223, 255, 0.2);
}

/* Button Styling */
.btn {
    width: 100%;
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.05em;
    text-transform: none;
}

.primary-btn {
    background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
    color: white;
    box-shadow: 0 4px 30px rgba(59, 130, 246, 0.5);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.primary-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
    box-shadow: 0 6px 40px rgba(59, 130, 246, 0.7);
    transform: translateY(-2px);
}

.primary-btn:active:not(:disabled) {
    transform: translateY(0);
}

.secondary-btn {
    background: rgba(96, 165, 250, 0.1);
    color: var(--crystal-blue);
    border: 2px solid rgba(96, 165, 250, 0.3);
    box-shadow: 0 2px 15px rgba(96, 165, 250, 0.2);
}

.secondary-btn:hover:not(:disabled) {
    background: rgba(96, 165, 250, 0.2);
    border-color: rgba(96, 165, 250, 0.5);
    box-shadow: 0 4px 25px rgba(96, 165, 250, 0.4);
    transform: translateY(-2px);
}

.secondary-btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Status Messages */
.status-msg {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    display: none;
}

.status-msg:not(:empty) {
    display: block;
}

.status-msg.error {
    background-color: rgba(239, 68, 68, 0.2);
    color: #FCA5A5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-msg.success {
    background-color: rgba(16, 185, 129, 0.2);
    color: #6EE7B7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-msg.info {
    background-color: rgba(37, 99, 235, 0.2);
    color: #93C5FD;
    border: 1px solid rgba(37, 99, 235, 0.3);
}

/* Bottom Tree */
.bottom-tree {
    margin-top: 4rem;
    opacity: 0.6;
}

.tree-small {
    width: 180px;
    height: auto;
    filter: drop-shadow(0 0 20px rgba(96, 165, 250, 0.4));
}

/* Responsive Design */
@media (max-width: 640px) {
    .xi-logo {
        font-size: 5rem;
    }
    
    .event-title,
    .event-subtitle {
        font-size: 1.5rem;
    }
    
    .form-header .xi-logo {
        font-size: 3.5rem;
    }
    
    .form-header .event-title,
    .form-header .event-subtitle {
        font-size: 1.25rem;
    }
    
    .welcome-text {
        font-size: 1.5rem;
    }
    
    .tree-image {
        width: 200px;
    }
    
    .tree-small {
        width: 120px;
    }
}

.container {
    width: 100%;
    max-width: 480px;
    padding: 1rem;
}

.form-card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-header {
    margin-bottom: 2rem;
}

h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #111827;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.375rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s ease;
    background-color: white;
}

input:hover,
textarea:hover {
    border-color: #D1D5DB;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: #9CA3AF;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
}

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

.primary-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.primary-btn:active:not(:disabled) {
    transform: translateY(0);
}

.success-btn {
    background-color: var(--success-color);
    color: white;
}

.success-btn:hover {
    background-color: var(--success-hover);
}

.secondary-btn {
    background-color: var(--text-color);
    color: white;
    margin-top: 0.25rem;
}

.secondary-btn:hover {
    background-color: #374151;
    transform: translateY(-1px);
}

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

.success-icon {
    width: 64px;
    height: 64px;
    background-color: #D1FAE5;
    color: var(--success-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.category-display {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 1.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    display: inline-block;
}

/* Loading state */
.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Status Messages */
.status-msg {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    display: none;
}

.status-msg:not(:empty) {
    display: block;
}

.status-msg.error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FCA5A5;
}

.status-msg.success {
    background-color: #D1FAE5;
    color: #065F46;
    border: 1px solid #6EE7B7;
}

.status-msg.info {
    background-color: #DBEAFE;
    color: #1E40AF;
    border: 1px solid #93C5FD;
}

/* Category Selection */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.category-btn {
    padding: 1.25rem 1.5rem;
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.category-btn:hover {
    border-color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
}

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

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

.continue-action {
    margin-top: 2rem;
}

/* Animation for form elements */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-card {
    animation: fadeIn 0.5s ease-out;
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .form-card {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
}