/* ==========================================================================
   Fever Spin-to-Win — Screen Layout & Transitions
   
   Each screen is a <section> that fills the viewport.
   Only one screen is visible at a time.
   ========================================================================== */

/* Screen container — holds all screens */
.game-container {
    position: relative;
    width: 100%;
    max-width: var(--max-width);
    min-height: 100dvh;
    margin: 0 auto;
    overflow: hidden;
}

/* Individual screen — full viewport, centered content */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--screen-padding);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), transform var(--transition-slow);
    transform: translateY(20px);
    z-index: 1;
}

.screen.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    z-index: 10;
}

/* Screen inner content wrapper */
.screen-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    width: 100%;
    max-width: 100%;
    text-align: center;
}

/* Logo */
.logo {
    width: 160px;
    height: auto;
    margin-bottom: var(--space-md);
}

/* Campaign closed banner */
.campaign-banner {
    width: 100%;
    padding: var(--space-md);
    background: var(--color-error);
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    text-align: center;
    border-radius: var(--radius-md);
}

/* Prize code display */
.prize-code {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    background: var(--color-surface);
    border: 2px dashed var(--color-accent);
    border-radius: var(--radius-lg);
    margin: var(--space-md) 0;
}

.prize-code-text {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--weight-extrabold);
    letter-spacing: 0.1em;
    color: var(--color-accent);
}

.prize-code .btn-copy {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-xs);
    background: var(--color-accent);
    color: var(--color-background);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: opacity var(--transition-fast);
    white-space: nowrap;
}

.prize-code .btn-copy:hover {
    opacity: 0.8;
}

/* Share buttons row */
.share-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.share-row span {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.share-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text);
    font-size: var(--text-lg);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Claim form layout */
.claim-form {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* Celebration effects container */
.celebration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

/* Loading spinner */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-text);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Pulse animation for CTA buttons */
@keyframes pulse-glow {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 20px rgba(255, 51, 102, 0.3); }
    50% { box-shadow: var(--shadow-lg), 0 0 40px rgba(255, 51, 102, 0.5); }
}

.btn-primary.pulse {
    animation: pulse-glow 2s ease-in-out infinite;
}

/* Slide-up entrance for results */
@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: slide-up 0.5s ease-out forwards;
}

/* Stagger children animations */
.stagger > * {
    opacity: 0;
    animation: slide-up 0.4s ease-out forwards;
}

.stagger > *:nth-child(1) { animation-delay: 0.1s; }
.stagger > *:nth-child(2) { animation-delay: 0.2s; }
.stagger > *:nth-child(3) { animation-delay: 0.3s; }
.stagger > *:nth-child(4) { animation-delay: 0.4s; }
.stagger > *:nth-child(5) { animation-delay: 0.5s; }
.stagger > *:nth-child(6) { animation-delay: 0.6s; }