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

:root {
    --primary-color: #c41e3a;
    --secondary-color: #165b33;
    --gold: #ffd700;
    --bg-gradient-start: #0f2027;
    --bg-gradient-mid: #203a43;
    --bg-gradient-end: #2c5364;
    --card-bg: rgba(255, 255, 255, 0.95);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    --border-radius: 16px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-mid), var(--bg-gradient-end));
    min-height: 100vh;
    color: #333;
    position: relative;
    overflow-x: hidden;
}

/* Animation de neige */
.snow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.snow-container::before,
.snow-container::after {
    content: '❄';
    position: absolute;
    top: -10%;
    color: rgba(255, 255, 255, 0.6);
    font-size: 20px;
    animation: snowfall 10s linear infinite;
}

.snow-container::before {
    left: 10%;
    animation-delay: 0s;
}

.snow-container::after {
    left: 80%;
    animation-delay: 5s;
}

@keyframes snowfall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Container principal */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 2;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
    padding: 2rem 0;
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px var(--gold), 0 0 40px var(--gold);
    }
    to {
        text-shadow: 0 0 20px #fff, 0 0 30px var(--gold), 0 0 40px var(--gold), 0 0 50px var(--gold);
    }
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Form styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #555;
}

input[type="text"],
input[type="email"],
input[type="date"],
input[type="time"],
input[type="number"],
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: inherit;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

textarea {
    resize: vertical;
}

/* Buttons */
.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #a01729);
    color: white;
    box-shadow: 0 4px 15px rgba(196, 30, 58, 0.3);
    width: 100%;
    font-size: 1.2rem;
    padding: 1.2rem 2rem;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #a01729, var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-add:hover {
    background: #0e3d21;
    transform: translateY(-2px);
}

.btn-reveal {
    background: linear-gradient(135deg, var(--gold), #ffed4e);
    color: #333;
    font-size: 1.3rem;
    padding: 1.2rem 2.5rem;
    width: 100%;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.btn-reveal:hover {
    background: linear-gradient(135deg, #ffed4e, var(--gold));
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

/* Participants section */
.add-participant {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.participants-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.participant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
    transition: all 0.3s ease;
}

.participant-item:hover {
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.participant-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.participant-info strong {
    color: #333;
    font-size: 1.1rem;
}

.participant-info small {
    color: #666;
    font-size: 0.9rem;
}

.btn-remove {
    background: transparent;
    border: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    background: rgba(196, 30, 58, 0.1);
    transform: rotate(90deg);
}

.participant-count {
    text-align: center;
    padding: 0.75rem;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.1), rgba(22, 91, 51, 0.1));
    border-radius: 8px;
    font-weight: 600;
    color: var(--secondary-color);
}

/* Actions section */
.actions-section {
    margin-top: 2rem;
}

.pairings-result {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(22, 91, 51, 0.1));
    border-radius: var(--border-radius);
    text-align: center;
}

.pairings-result h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.links-list {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.link-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.link-item strong {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.link-url {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.link-url input {
    padding: 0.5rem;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    font-size: 0.9rem;
    width: 300px;
    font-family: 'Courier New', monospace;
}

.btn-copy {
    padding: 0.5rem 1rem;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-copy:hover {
    background: #0e3d21;
}

.btn-copy.copied {
    background: var(--gold);
    color: #333;
}

/* Participant view */
.participant-view {
    max-width: 700px;
}

.participant-card {
    margin-top: 2rem;
}

.greeting {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid rgba(196, 30, 58, 0.2);
}

.greeting h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.greeting h2 span {
    color: var(--secondary-color);
}

.welcome-text {
    color: #666;
    font-size: 1.1rem;
}

.event-details {
    margin-bottom: 2rem;
}

.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.detail-item:hover {
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.detail-icon {
    font-size: 1.5rem;
}

.detail-item div {
    flex: 1;
}

.detail-item strong {
    display: block;
    color: var(--secondary-color);
    margin-bottom: 0.25rem;
}

.detail-item span {
    color: #333;
    font-size: 1.1rem;
}

.reveal-section {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05), rgba(196, 30, 58, 0.05));
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

.mystery-text {
    color: #666;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.reveal-content {
    margin-top: 2rem;
    padding: 2rem;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gift-animation {
    margin-bottom: 1.5rem;
}

.gift-box {
    font-size: 5rem;
    animation: bounce 1s ease-in-out infinite;
}

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

.recipient-name {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.recipient-name span {
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 2.5rem;
    display: block;
    margin-top: 0.5rem;
}

.reminder {
    color: #666;
    font-size: 1.1rem;
    font-style: italic;
}

.instructions-section {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(22, 91, 51, 0.05), rgba(255, 255, 255, 0.5));
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
}

.instructions-section h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.instructions-section p {
    color: #555;
    line-height: 1.6;
    font-size: 1.05rem;
}

.participant-footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    color: white;
    font-size: 1.1rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

/* Footer signature */
.app-footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    color: white;
    font-size: 1rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

.app-footer strong {
    color: var(--gold);
}

/* Login page */
.login-card {
    max-width: 450px;
    margin: 2rem auto;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.error-message {
    padding: 0.75rem;
    background: rgba(196, 30, 58, 0.1);
    border-left: 4px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 4px;
    margin-bottom: 1rem;
    text-align: center;
    font-weight: 600;
}

.btn-logout {
    position: absolute;
    top: 2rem;
    right: 2rem;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

/* Scrollbar personnalisée */
.participants-list::-webkit-scrollbar {
    width: 8px;
}

.participants-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.participants-list::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

.participants-list::-webkit-scrollbar-thumb:hover {
    background: #0e3d21;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .add-participant {
        grid-template-columns: 1fr;
    }

    .link-item {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .link-url {
        width: 100%;
        flex-direction: column;
    }

    .link-url input {
        width: 100%;
    }

    .recipient-name {
        font-size: 1.5rem;
    }

    .recipient-name span {
        font-size: 2rem;
    }
}