body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0f172a;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

    

.container {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: 24px;
    padding: 48px 40px;
    max-width: 480px;
    width: 100%;
    position: relative;
    z-index: 1;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
}

h1 {
    color: #f1f5f9;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: #94a3b8;
    font-size: 14px;
    font-weight: 400;
}

.input-group {
    margin-bottom: 24px;
}

label {
    display: block;
    color: #cbd5e1;
    margin-bottom: 10px;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.3px;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #64748b;
    font-size: 20px;
}

input {
    width: 100%;
    padding: 16px 16px 16px 48px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 12px;
    font-size: 16px;
    color: #f1f5f9;
    transition: all 0.3s ease;
}

    input::placeholder {
        color: #64748b;
    }

    input:focus {
        outline: none;
        border-color: #3b82f6;
        background: rgba(15, 23, 42, 0.8);
        box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    }

.btn-primary {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

    .btn-primary::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        transition: left 0.5s;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
    }

        .btn-primary:hover::before {
            left: 100%;
        }

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

.result {
    margin-top: 32px;
    padding: 24px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 16px;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
    pointer-events: none;
}

    .result.show {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

.result-label {
    color: #94a3b8;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.daycode-display {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 40px;
    font-weight: 800;
    letter-spacing: 4px;
    font-family: 'Courier New', monospace;
    margin-bottom: 16px;
}

.copy-btn {
    padding: 8px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 8px;
    color: #60a5fa;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

    .copy-btn:hover {
        background: rgba(59, 130, 246, 0.2);
        border-color: #3b82f6;
    }

    .copy-btn:active {
        transform: scale(0.95);
    }

.footer {
    margin-top: 32px;
    text-align: center;
    color: #64748b;
    font-size: 12px;
}

@media (max-width: 480px) {
    .container {
        padding: 36px 24px;
    }

    h1 {
        font-size: 24px;
    }

    .daycode-display {
        font-size: 32px;
        letter-spacing: 3px;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.copied-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

    .copied-notification.show {
        opacity: 1;
        transform: translateY(0);
    }